Billionaires in the USA are completely and totally beholden to the military-industrial complex, for the most part. Look how they all scrambled for JEDI, for example.
The US military alone spends the entire net worth of the richest private person in 17 weeks, wealth it took him 30-ish years to accumulate; that's not counting the rest of government spending. There's an argument that any senator is "richer" than the richest private person in the country. It's not even the same ballpark.
Did you have specific instances in mind?