> This is not uncommon in the US either, in the finance industry, at startups, at much bigger competitive companies, in medicine.
Is it anywhere near 25% of the US companies, though? I doubt it.
Finance and startups are high-risk, high-return endeavors. It's one thing to work 80 hours of overtime as a trader/VP/software engineer earning good money, having a sense of autonomy and accomplishment, etc. And if you quit or your startup fails, you can always get another job, change fields or even take a break. It won't be a black mark against you.
It's a very different thing to work 80 hours of unpaid overtime as a courier [0], with no autonomy and virtually no career progression. Sure, you can quit. But the perception is, "why would I quit if the alternative is just a different delivery sweatshop?".
FWIW professions/companies that have strong unions tend to have less problems with unpaid overtime, but they're a minority.
[0] http://www.japantimes.co.jp/news/2017/03/04/business/corpora...