[slang800]

You are presenting a false dichotomy. Eli could dump his money into the US government and advocate for increased taxes for the rich. In fact, if he did that then he would be arguing from an even stronger position since it's obvious that he actually believes what he is saying and he's not just virtue-signaling.

[jsgo]

you're assuming a dichotomy was presented. Again, what does one person putting forth extra of their funds do in the big picture?

Concerns of virtue signaling? The ramifications of what he is proposing is that if he gets his wish, he (and others like him) have their taxes go up. He's coming out in support of policies already being discussed (and attempting to persuade other politicians to also champion those policies). This isn't changing one's profile picture in support of the cause of the moment.