If something can become corrupted, or be made immoral or evil, then it follows that it can at first be neutral or good; it can be uncorrupt to begin with, or can be uncorrupted again after becoming corrupt.
What is inherently immoral--be it theft, coercion, rape, murder, caging, kidnapping--cannot be made into something moral or good, not by way of scribbles on paper called law, titles, badges, uniforms, police cars, tanks, elections, intelligence agencies, constitutions or flags.
The thing that distinguishes government from other terms such as organization, business, church, or community, is that it claims the right to use violent force to IMPOSE its will. Without that power, it is not government.
What is purely voluntary among humans is called by other names-- it is referred to as volunteering, charity, donation, community, organization, business, and cooperation.
Government in its very essence, however, is the claim of some humans to have the right to use deadly force to impose their will on other humans.
Government is not corrupted in the sense that most people mean when they call it "corrupt". It did not start off as something good and become corrupted into evil. It did not start off as something moral, or it would not have started at all.
This is why you cannot "infiltrate" government to make it into something good and to change its actors into people who act morally. If they all acted morally, there would be no government and they'd all walk away from politics and elections.
Hmmm, don't see the power-hungry sociopaths doing that now, do you? Control breeds more control, which breeds real chaos. Sociopaths who seek to violently rule others only know one function: control.
What many people irrationally believe is that somehow government is full of individuals who can represent them. Represent them to do what, exactly? How many people ever stop to consider what it is they need some strangers in D.C. to be doing on their behalf from hundreds or thousands of miles away?
I have said before, and it bears repeating, that a statist will always call it "corrupt" when their neighbors use the government to point the guns at them, yet those same statists call it "representation" when they succeed in pointing the same government guns at their neighbors.
Everyone who supports the state supports the government coercing their fellow men, but never themselves, and therein lies the clue to what government is. It is not some group of good individuals whose job was originally to do good things for people, and yet, "oops", somehow fell by the wayside. Government is a group of individuals who have always and will always thrive on using the threat of deadly force to rule over other human beings like cattle.
Since it is true that what is NOT corrupt to begin with cannot be uncorrupted, it follows that obviously what is purely immoral cannot be infiltrated for the purpose of being made moral.
When you understand what all government fundamentally is, you disavow all notions of being able to "change it from the inside".