they got rich by wanting to get rich and make money; that's the entire motivation and it doesn't have a ceiling.
you don't just get rich and stop, it doesn't stop for these people. They aren't rich enough. They aren't powerful enough.
Most folks at that table with Trump are way beyond the joy of creation; they're playing politics now, and their game is the competition with the 200 other hyper-elite for positional vying.