perhaps game theory at play… they may realise that their lives would be better than what they pay in tax if all of them paid more tax, but they aren’t going to be the only ones to do it so they want it to be law
or it could just be PR bullshit and they relentlessly lobby for the reverse and pay more than what they’d pay in tax behind the scenes
The small handful of rich people who ask for economic justice and mostly live by it, mixed in with those who just want to virtue signal while doing the same shady shit of legal bribery to keep the status quo that make a public statement knowing full well that it will never get done because of the legal bribery from the regular rich people and virtue signalling rich people.