I used to believe left was much better. Perhaps.
But there are tons of money going around behind the scenes left or right. We're just none-the-wiser end user idiots.
Republicans and their appointed justices have on many occasions, not just the CU ruling, weakened regulations on how much money can be openly thrown at politicians, and just this year 100% legalized transparent bribery. Along the way, Democrats were forced to make a choice: fundraise or let Republicans take full permanent control of everything. What do you think they should have done differently?
That said, there are two broad types of political corruption:
1) Position yourself to make money when policies that are beneficial for society go into effect or flat out accept bribes to implement policies that are beneficial for society.
2) Position yourself to make money when policies that are detrimental for society go into effect or flat out accept bribes to implement policies that are detrimental for society.
I'd love for there to be no corruption. In the meantime, in the real world, I will vote for the former over the latter all day every day and twice on Sunday. Anyone trying to equate the two types as equally bad or evil is a fool (edit: a fool or positioned to make money when bad policy goes into effect).