And how many plumbers and dry-wallers own their own business, vs. the ones that are on drugs and just survive?
Wow, stereotypes. There are plenty of hard-core druggies among software and finance types as well. Probably more, considering that stimulants help people deal with long working hours.
And the high-pressure white-collar folks tend to be more apt to overspend as well. They might make more at the outset, but the money goes down the drain just as quickly.