We have lots of restrictions on corporate behavior because markets do not solve human problems, they solve corporate problems.

The corporate response to long hours and low pay is to put up suicide nets. In the U.S. we have minimum wage, hourly restrictions, break, and overtime laws.

You can't trust the market to weed out bad players when the bad players are the ones with enough money to buy public perception and government influence. You have to force them to do the right thing through legislation.