[rogerbraun]

Probably because there is a rather obvious negative interpretation: People think they have a real chance to become a millionaire, while in reality, they will probably always be comparatively poor. So they always make decisions based on this imaginary future as a rich person, even if it is much more likely that they will not be better off in the future.

[walexander]

Lots of people seem to think this is bad for plumbers, but I rarely see anyone complain when the same thing is dreamed by a 19 year old in YC.

[shrikant]

The implicit assumption is that the plumber is farther along in his life and has a lot more (family, home, social benefits, health, etc.) to lose than a 19 yr old in YC...