It's less about the cap and more about the wage curve. Some industries are extremely punishing. As a musician you either make nothing or millions. As an archite

It's less about the cap and more about the wage curve. Some industries are extremely punishing. As a musician you either make nothing or millions. As an architect you get paid poverty wages or you're internationally famous and can name your price. If you're a welder you'll get a very good starting wage, and while it will never hit stratospheric levels, the upper end when you you've had years of experience and have worked to increase your qualifications can be extraordinarily generous. I know two highly qualified welders that work on oil plant equipment and they make so much money they can afford to take half the year off to do whatever they want. You don't want random idiots welding pipes in a billion dollar plant, and you need to pay for that kind of talent. Consider: Tech workers often get paid very well, but I don't know of many that get overtime.