The power of the voting booth is the only counteracting force to big money. The trouble is that the truly ignorant can be conned into voting against their own interests, such as the main body of trumpsters, but much of the time one or two items are clearly binary and the greediness is exposed which favors the democrats. This giant gap in wealth distribution didn't happen by accident.
Fear is a tried and true tactic to keep the ignorant in line, and fear can be translated into hatred at the drop of a MAGA hat.
Building the wall is an example of playing on fears, even if the whole idea of making mexico pay for it was a farce. Hatred of obama has led the ignorant to giving up health care willingly in some cases... a pretty simple bait-and-switch.
Now we have a whole party turning a blind eye to blatant conflicts of interest, hell, even defending it in some cases, when in the past both parties basically kept the appearance of integrity as a noble cause.