I'm sure you're suggesting that it's politically infeasible to implement policies that curtail the worst excesses of capitalism, but in case you are saying it's not feasible to tax anything but income, then the words 'sales tax', 'vice tax', or the hilarious (because of resulting inverted pyramid buildings) 'footprint tax' are easily searchable examples. The footprint tax being a cautionary example of unintended outcomes. Interestingly New Zealand law states you can't try to get around taxes on technicalities, which depending on your view on how government can abuse power is either great common sense or the sound of authoritarian klaxons peeling the end of freedom through airy-fairy arbitrary laws.