I'm one of these consultant-tru-my-own-company thing, and I make about 130k post tax. I work a lot tho. 7:30 at one office, at 4pm I'm into another job until 9pm, possibly more. Weekend sometimes, oh, and I worked over the xmas break.
But, I'm paid by the hour, i don't care. I used to care, had lots of jobs where 'the job' was the all important factor, 'the project', 'the product', 'the company', now, I don't I'm a rate whore.
Just that change of philosophy doubled my net, easily.
As for the 'but but if you die you..' comments, well, I actually LOVE my job, I can't possibly think of a way I could 'retire' and go fishing. I'd die of boredom within 6 months.
Mind you I mostly work from home, so I do have quite a few other activities during the 'working' day...