Does he lobby for higher taxes? Buffet, Gates etc. always say they should be taxed more but I haven't heard of them actively supporting candidates and causes t

Does he lobby for higher taxes? Buffet, Gates etc. always say they should be taxed more but I haven't heard of them actively supporting candidates and causes that will actually do this. If they really want it to change they have a lot of power (money) to influence politicans and help make it happen.