And in practise, most of the "students, musicians and architects-working-at-cafe-and-having-too-much-free-time" will turn into the "doctors & architects-with-jo

And in practise, most of the "students, musicians and architects-working-at-cafe-and-having-too-much-free-time" will turn into the "doctors & architects-with-jobs-and-kids", so it's really the ageing process that drives this process. Later the "doctors & architects-with-jobs-and-kids" will turn into pensioners, and when they move on to the next world, the cycle restarts. So it's not some kind of nefarious scheme that 'drives out' the allegedly more creative people, but rather communities evolve around ageing and family creating.