Wall St. often operates on the "bust out" model the mob used. It's just legal for Wall St.
Get control of a business, talk them into debt they can finance with either cash flow, or an unrealized asset they're sitting on (like city real estate), so they can "transform" the business.
Pay yourselves consulting fees and bonuses for the infusions of cash along the way, and when the business is bankrupt and banks won't lend them any more money, bust the joint out, i.e. chop the business up and make a commission selling the pieces.
Blame the failure of the company on management (after all, they let you talk them into all the debt), then swim around in the water for the next victim.