[mangotrees]

I believe you're confusing top-line revenues and profits available for the tradesman. As it stands, you're asserting that your plumber makes approximately 14x the average plumber in America, and 10x the average plumber in San Francisco. This is unlikely to be correct.

In a similar vein, Apple takes in over $2,000,000 of revenue per employee, but Genius Bar employees are not taking that amount home. I mention this solely because it uses the same reasoning evident in your initial claims.

[mars4rp]

I kind of agree with your point, but you really think an average licensed plumber in SF makes $200/day???

[mangotrees]

Well, I did a cursory search for data, and it seems to indicate that this is the case.

So yes... I think the average plumber in SF is making about $70k/yr. (so ~$300 per day worked, or $200 per day).