[scotty79]

"Then, in 1986 Congress passed a bill exempting GPOs from the anti-kickback provisions embedded in Medicare law. This meant that instead of collecting membership dues, GPOs could collect “fees”—in other industries they might be called kickbacks or bribes—from suppliers in the form of a share of sales revenue."

No one in their right mind could imagine that anyone could be genuinely stupid enough to think that allowing organisation that was supposed to work for buyers, take money from sellers is a good idea.

That law was 100% surely bought. You don't need any other proof that USA has best Congress money can buy.