this culture of abusing your workers spills out into the US workforce as well. i've known people (us citizens) who have had to send lawyer letters to get their invoices paid by these consultancy firms, who aren't used to getting pushback from their servants. sometimes in the tens of thousands of dollars for high end work.
of course the bad behavior stops immediately when they get a nice little letter with an american law firm's name at the top of it.
they're scumbags.