Generation Y Internet users aspire to become rich and famous rather than work for their country
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At my UK University there is a strong culture of getting a good degree in a quantitative field, perhaps doing a PhD in a similar (but still quantitative) field and then being plucked out by a large investment bank to work as a "quantitative analyst". The salary is good, but I'm sure the work becomes tedious after a while. The process is almost as precise as an automobile assembly line!
I wish the culture of entrepreneurialism was stronger than the desire to go and price financial derivatives. After all, two/three hundred years ago nearly everybody was an entrepreneur (farmers). How things have changed...
http://en.wikipedia.org/wiki/High_Performance_Computing_and_...
I don't know the answer to your second question, nor could I answer it for the median of whatever group Larry & Sergey represent.
On the other hand, the comparison isn't so useful. How many young people are choosing between politics and hacking? The two skill sets overlap only slightly.