Knowing how smart and methodological Musk is, I wouldn't be surprised if the rule at the office is actually to leave your desk and go home at 5pm sharp.
You are prone to make more mistakes when you tired and overworked and I cannot imagine more important place not to make mistakes, than building a rocket.
https://www.quora.com/How-many-hours-a-week-does-a-typical-S...
http://spacenews.com/op-ed-3-things-to-know-if-you-want-to-w...
https://www.reddit.com/r/spacex/comments/25ixxq/is_spacex_wo...
Yes, they have experienced people too, but overall, turnover is high for a reason: https://hackerlife.co/blog/tech-employees-turnover/Los-Angel...
Which is exactly the kind of people that SpaceX does not want and who should not apply there. The turnover is high for a reason indeed.
So they are paid overtime for this, is that correct?
Is that even legal in USA? Aren't they obligated by OSHA and USDOL to be paid for the time they work??
So US doesn't have paid overtime on a regular salary work?