Effective altruism doesn't deserve to be slandered like this. It's what the better billionaires were into, and few and far between. Some may have given it a bad name through some weird personal guilt trip, but it was generally the good thing on the label.
I generally agree that we need heavy socialist controls on capitalism. I'm a capitalist, yeah, but "pure" capitalism isn't a thing and is clearly dumb. If you don't have controls, billionaires will use money to corrupt/change the rules. THIS is the biggest thing you have to prevent. We can argue about how to do so, but there shouldn't be argument that it needs to be done.