Politicians' elections are sponsored by businessmen and big corporations. When they win elections, they will definitely compensate their sponsors. Trump would have to make policies that would benefit his sponsors and other presidents have also done the same. The wealth of nations can never be distributed equitably. There will always be the rich and poor and the US is not an exception.
Personally I haven't heard any politicians today really support the citizen instead of the rich bad people/entities. As we know money is the strongest weapon in the world, everyone wants money, including politicians.
The good politicians that are on citizen's side only exist in the past, when money is still not the most important thing.