Can you explain why you consider FBI, DOJ, EPA etc. scum? The people who work there are not multimillionaires. Most are career specialists. Much better than rabble rousing politicians and unscrupulous bankers, no?
Are you talking about worker bees or the ones giving the orders? Sure, those at the lower levels in political machines might not be multimillionaires (although that's far from certain here), but that doesn't mean that they're a bunch of Dudley Do-Rights either.
They have to be doing well enough to be able to live in Washington DC in luxury housing, the most expensive area in the USA to live.