Trump had a reputation of not just doing business with the mob, but of stiffing his contractors on their final payments. He would pay 80% and then stiff them for the final 20% because it would take too much money for them to sue him for it.
He also hired Polish workers and paid them less than $5.00 an hour and didn’t even give them hard hats. In pictures of Trump high rise construction, you could always spot the slave wage Polish workers. No hard hats.
They were all Chapter 11 restructurings, which lets a company stay in business while shedding debt it owes to banks, employees and suppliers.