Strangely, I guess, if I try to imagine myself having one billion dollars, it's just an amount of money that the only way I'd even make a dent in it is if I either was specifically making bad purchases or if I had lost my mind. (For example, just gambling it all away.)
Even if you simply threw it in a normal index fund that isn't focused on dividends, but growth, you might still make 1%, or 10 million a year in dividends. So just the dividends you accidentally make would let you live a very luxurious lifestyle.
I could imagine having one billion dollars if it was just the worth of my private company that I didn't want to split up or something like that, but otherwise, it's really just too much money. I'd be donating to charities just to keep my net worth at a level that I could look myself in the mirror and not feel like a villain, and so I'd actually be in favor of things like wealth taxes. It would just make my life easier.
I think people who imagine themselves as billionaires and are still stingy with money are either not accurately imagining that amount of money, or they're too stupid to have any amount of money, or they're villains, just like every billionaire today is a villain.
I seem to recall this was from a few years ago. At this point, I wouldn't hold it against her if she's made more money. Big name politicians can make extra money through things like speaking fees and book deals. Honestly, I'd be surprised if any famous politicians aren't taking speaking fees. Plus, her salary is $174,000/year according to Wikipedia.
I like to at least pretend in my head that I'd be an ethical politician were I ever elected (a job I would never actually want), and if somebody offered me a speaking fee that was sort of the average amount a politician might get, I think I'd still be able to convince myself it wasn't a bribe.