They're ALL self interested, many are crooked and it's always been that way and of course--will remain that way. You , for some reason seem to favor republicans over democrats , which tells me either you are not a working person or have not studied up on which rulers have been consistently better for the working / common citizen. Really doesn't matter what you or I think anyway---they still own us --- always have---always will.
There was definitely an inversion where the democrat party became the party of the elites and the republicans championing the working person. The left right model of the 1900s changed up a bit. The left in charge seem to be the war mongers now too.