Some level of corruption is an inescapable part of political life in general, and certainly Democrats are not (and never have been) immune to it. But it has been especially chronic in the modern Republican Party, whose last experience with control of government ended in a series of corruption scandals so blatant they provoked widespread soul-searching on the right as to how the party and the conservative movement could so easily open itself up to grifters. (Remember Jack Abramoff? Bob Ney? Tom DeLay? Grover Norquist?) The temptation to use government as a vehicle for self-enrichment is especially strong in a party dedicated to a credal skepticism about the possibility government can do good.
….The sorts of people Trump admires are rich and brash and disdainful of professional norms, and seem unlikely to rat on him. The sorts of people who are apt to work for Trump seem to be those who lack much in the way of scruples.
The administration is understaffed and disorganized to the point of virtual anarchy, opening up promising avenues for insiders to escape accountability.
…Trump himself is a wildly unethical businessman who has stiffed his counterparties and contractors, and worked closely with mobsters, his entire career. A president who is continuing to profit personally from his office is hardly in any position to demand his subordinates refrain from following suit.