Let’s say you take that $10bn and manage a portfolio with ~30% a year volatility.
So you pay $300m to manage a bunch of assets that move around by ~$3bn a year.
All of a sudden paying $500k for a speech, a dinner, and a the start of a relationship with a top 10 government policymaker, seems like a bargain.
Same reason Clinton and Obama can do the same after the leave office. Part wisdom, part networking.
Doesn’t have to be nefarious to be a good investment when your business is that scale.