Politics results in corruption either way.
If big government values are the political flavor of the moment big money interests (big business, big labor, etc.) will agitate for new taxes and regulations that hurt their competition.
If small government values are the political flavor of the moment big money interests will agitate for less taxes and regulations in a careful manner that benefit them and not their competitors.
One side isn’t more or less corrupt than the other, politics is the game of the powerful at the expense of the powerless. As a libertarian I want little as possible to be determined in the realm of politics but it’s not just a matter of rolling back policies.
Libertarian ends means empowering people to be the solution themselves. People need to understand how they can start charities and businesses to solve today’s problems so their demand for government involvement isn’t the avenue for someone else’s corruption. (Special interests will always use your frustration, your anger as the door to get their pet project enacted)