Should there be a cap on hours worked per week?

[bedstuy]

It depends on the industry to an extent.  Pilots, nurses, doctors, people who have the power to kill you by accident, they should get a chance to sleep at some point. 

Otherwise, I would also wonder if there's a point where you're compromising your level of attention and the quality of your work by not taking breaks.  But, there are weeks from hell where you absolutely need to put in 70-80 hours because there's a hard deadline in front of you.  So, I don't think you need a hard cap in something like investment banking. 

And, what about feeling sad for the people who killed themselves because they lost their house in the financial crisis caused by these poor, hard-scrabble, overworked bankers?  It's hard for me to feel sorry for investment bankers, they chose that life because they wanted lots of money.