Regardless of merits of your PPP loans as corruption argument, what I’m more interested in is what “high grade” corruption would look like in context of a trade

Regardless of merits of your PPP loans as corruption argument, what I’m more interested in is what “high grade” corruption would look like in context of a trade union. Is an organization like UAW, of half a million members, and $200M of annual revenue capable of “high grade” corruption? What does it look like, if indicting 15 members including ex president ain’t it?