It's already like this. The rich fly in private jets that take a fraction of the time that driving does.

L.A. has the "Lexus Lane"

http://articles.latimes.com/2012/nov/17/local/la-me-1118-lop...

Very small number of people are rich enough to build their own roads (with all rights of way issues, etc.). And each road would only connect very small number of points. Helicopter probably would be way, way cheaper at this point.

Paid roads with less traffic, etc. or paid lanes are a commonplace, OTOH, but one doesn't have to be exactly rich to use them.

Is this supposed to be a reductio?