Agreed that that needs to be the primary focus...however (you knew there was going to be a "however"):
Income and wealth inequality have reached pretty ridiculous levels, and noting that as a problem is not "bemoaning" people their (well-earned) wealth. A lot of that is not money earned by advancing society, a lot of is extractive/rent-seeking that is actually harmful (cough 2008 cough).
For example:
"The median American estimated that the CEO-to-worker pay-ratio was 30-to-1, and that ideally, it’d be 7-to-1. The reality? 354-to-1. "
https://www.scientificamerican.com/article/economic-inequali...
Sorry, 354:1 is absolutely ludicrous, and I know a little bit of what I am talking about. My father was a high-ranking auto-executive, had actually been planned to succeed Carl Hahn as CEO of Volkswagen, but some funky politics got in the way of that. He never made that kind of money, and didn't want to. He thought it was obscene. And it is.
He also thought unions were a Good Thing™, and they are. If nothing else, they are selective pressure on companies to become better. And that's despite having that belief tested to the limit, because at VW the unions pretty much run the place.
So yes, envy is not a good thing, but noting that CEO pay is ridiculous, that banker's bonuses need to be reined in lest we all suffer the consequences, again, and that inheritance tax is not the devil is not "bemoaning".