(not a repub) I don't defend it, its outright fraud, but I also accept the reality that it is a more visible, and perhaps exaggerated, form of what has been ongoing forever.
Those who seek power seek it to:
1. Enrich themselves and their family
2. Wield it to achieve their means
The "pay to play" is rife everywhere. The contractors who get a sweet deal from local / fed government, the competition is stifled. The senators who make 10's of millions on insider information. The imminent domain cases where property is seized so corporation / donor can make millions. The "futures market" where insiders use their knowledge of product release date to swindle money for ordinary folks. The crypto scams, lotteries, casinos, street vendors, telemarketers, info-mercials, self-help gurus, snake oil sales, lemon peddlers, and more.
The truth is that the human system has not deviated far from the imposed hierarchy of feudalism / monarchy, we have only become better at concealing it, making it more potent in some ways. Power, corruption, opportunism, and greed are part of our nature. In an extremely large population with a democratic veneer, the levers of power become diffuse an ineffable, until they are blatantly shoved into our face.
In some ways I'm glad because its only through a constant vigilance and resetting the public vigilance that these kind of things can be controlled to any degree. Its an entropic force, seeping into the system at all times, only kept at bay by the disdain of the populace and fear in the hearts of the ruling elites.
Its definitely not a Republicans only phenomenon, the list on both sides of the aisle is embarrassingly long. But due to how our political system is setup, and human psychology, little will change by voting. People are tribal, and only have two choices in the matter, both of which are usually power-seeking corrupted. The prisoner's dilemma is giving the US a life-sentence.