It's not "only" the billionaires. Many people don't actively try to reduce their Carbon emissions & choose less polluting alternatives. For example, nobody is forcing people to pull heavy caravans using their diesel vehicles. Or to fly on jets, etc.
Whilst there are plenty of folk selling products & ideas using "snake oil" ( misinformation \ greenwash), there are plenty of folk that are not choosing to regulate their own polluting behaviours (quite the opposite)