Most of the people I have met doing my PhD is doing it because they love their field and want to gain a deeper understanding, or work in the field.
Most of the people I have met doing my PhD is doing it because they love their field and want to gain a deeper understanding, or work in the field.
Many of the people I have met doing my PhD are doing it because they didn't want to go "into the real world" after undergrad and their undergrad advisors shoehorned them into getting their PhD. Anecdotally (I'm a biologist/chemist) this is less of an issue for chemists in top programs, because many of them have spent two or three years in industry, and are getting those three letters to round out their knowledge and experience with 80-hour workweeks sleeping in synthetic labs (where they accrue on the order of thousands-of-reactions experience). Biology is arguably worse, additionally populated by students who "couldn't hack the MD track" or slightly more charitably who "hated all the other Premeds". Mathematics is stricken by the student who got As throughout (typically PUI) undergrad math but never has done a proof, and had a mistaken idea about what it actually means to be a math grad student. In all three cases, graduate programs often look aside because they need warm bodies to TA/teach the intro classes.
Now, many of these people will not get their PhD, but some do, because for all the hemming and hawwing about the process by grad students, it really is an exercise in rubber stamping (in many jurisdictions the reality is you can't get rid of a grad student without running into serious legal problems, especially when you're paying them so technically they're employees and if you treat them poorly they have the leverage of tattling about the technically illegal labor conditions)
How many of these people pay tution, just curious...Any?
From a university's perspective, grad students are cheap labor that can eat a lot of sections of low level undergrad classes.
If you mean doing postdoctoral positions prior to securing a tenure-track position, then yes, that's generally true.
Maybe this is just Physics, I don't know.
At least in the geosciences, it's something like:
B.S.: Basic coursework and a senior thesis
* Senior Thesis: "Here's a well-defined problem, here's how I'd start, why don't you think about how you'd do it and go solve it"
M.S.: A class or two and a Masters Thesis
* Thesis: "Here's an relevant, unsolved problem. Go solve it."
PhD: Research (and lots of seminars)
* Dissertation: "Come up with 3 relevant, unsolved, and interesting problems. Then solve all three of them."
The big difference is really in finding your own interesting problems (and often finding funding for them as well) as opposed to being handed a problem.
I did a MS before I did my PhD, at different schools and with reasonably different projects, and am glad I did. Where I did my PhD, it was difficult to be accepted into teh PhD program without an MS.
However, I wouldn't say that the MS or equivalent is necessary to reach a 'full time course' because the American BS is less specialized than an equivalent degree elsewhere in the world, based on what I've learned from the many non-Americans I've worked with.
edit to answer question better:
In the American system, there is a lot of unrelated coursework (which has some guidelines, it's not just a sum of credits), but there are also a fair amount of core/science courses. I just looked at my coursework list and counted 16 courses (including fieldtrips and independent studies but not labs) in geoscience, then there is the requisite math, physics, chemistry.
The American system still takes the idea of a well-rounded 'liberal arts' education seriously (feel free to be skeptical and call it welfare for poets and historians, although I don't entirely share this position). I think university in many countries is a shorter process, although their high schools may be much better...
More and more schools seem to be heading towards PhD only for graduate geoscience programs (which is a mistake, i.m.o.). A lot of professors at Wisconsin were strongly pushing for it while I was there, though an equal number were opposed. I also think there's a large benefit to doing a separate MS, preferably at a separate institution. (If nothing else, it dramatically increases your breadth of experience.)
At any rate, I certainly agree with you. Having an MS makes it much easier to get into competitive PhD programs. Also, an MS is a common working degree for a large number of geoscientific jobs, so there's a strong demand for industry-focused MS graduates.
For those reasons (and not because a B.S. doesn't have enough coursework, i.m.o.), separate MS and PhD degrees are very common in the geosciences
That said, it would never make sense for me to get a PhD for job-related reasons: the opportunity cost is too high. (In fact, it's too high even considering that I have a lot of intellectual reasons why, if I had more time, I'd do one.) Economically, I'm better off to deal with the annoyance of PhD bigotry (and leave jobs if it is an issue) than go into a program that has almost (and possibly over) $1 million in opportunity costs and that I'll exit (if I'm lucky) at the unfundable age of 35.
I know why PhD bigotry exists; people conceive that the alternative is to admit that 4-6 years of time were wasted, so they have to build up this bullshit belief that without a PhD, you're just not research-grade. But I find that ridiculous. 4-6 years learning things you're passionate about and can use is never wasted; but don't bring me down (by insisting that everyone who hasn't made such an investment is somehow inferior) just because you're insecure about your choices. (Who isn't?)
Speaking from personal experience I'd largely agree with the parent's point. Also, speaking from my personal experience in academia, I'd suggest the field of academics, science or otherwise, is largely like any other industry: one's ability and intelligence can only carry one so far; who one knows typically has a far greater impact. This is especially true when applying to graduate school in the sciences. A person who is well-connected is far more likely to be picked up in a research program that is: a) of interest to him and b) well funded (as well as can be, in this area).
You are also correct that "connections" can count for a lot. Though pure degree discrimination is still very frequent.
Compare: "I'm good at doing this, trust me", and "I'm good at doing this, so sayeth this big university". It's a form of vetting, and we're all familiar with people who say they have long experience in something and are good at selling you on that, yet they wouldn't know their arse from their elbow. Or lack the deep knowledge a PhD would require of the topic.
Of course you can be awesome without a PhD (and far from all PhDs are awesome), but it's a credentialled form of vetting. A PhD also proves you can complete a multi-year project through the hard yards, and most of them run into plenty of difficulties.
People who are extremely bright and capable researchers wash out of PhD programs all the time for a variety of reasons entirely unrelated to their abilities or desires, and people who would be lost without their committee chairperson guiding their research complete their PhDs all the time.
I wasn't actually meaning to be disparaging at all, just waxing a little poetic, though I thought it was funny that I was being chided for being disparaging in a comment that was disparaging the exact same thing :)