The advice includes lowering your expenses by spending less. You are providing less total work and you are taking the value of that work back at a slower rate. So there's no reason anyone else has to work more or less. We simply don't need the lifestyle we are buying during our working years. Personally, I think it is time to drop the standard to a 30 hour work week.
It's funny that there is usually no winning with an argument over change in work habits because either you hurt people by making them work or you hurt people by taking away their work. ( Somehow the status quo is accidentally perfect, unless of course you examine any part of it.)
What on earth is this sentence supposed to mean?
The majority are easily told what to think by authority figures in the media, and people are constantly fooled into making stupid decisions and not seeing the bigger picture of events unfolding.
Corporations will use people until they are no longer useful, and then kick them out.
You need to put number 1 first.
Regarding your concern, I actually believe that early retirement will increase the overall productivity of the society (because people can work things that they find passion and purpose in). So it wouldn't be at the expense of others (sorry if I understand your point incorrectly).
I have addressed about this issue briefly in the "Productivity and fulfillment" section on the website. However, it is clearly lacking in depth. I will try to add more explanations on why I think that way.