The offending philosophy to any establishment is not defensively corrupt. It's not even possible. Can we imagine, for example, a scenario whereby Galileo overcame his established peers, merely by locking them in jail? The offending philosophy is not corrupt - because it cannot be corrupt - because it does not have the power to be corrupt. Sure, the offending-philosopher can just tell lies, continually, thus corrupting himself in that way. But when that philosopher is being genuine, and he lacks the power to physically silence the establishment, then that philosopher's views are definitely not 'corrupt' in the moralistic-manner which I imply.
Then neither are the defending philosophy. If Galileo had won, he would likely have done the same. If he did not, he could not have won. Everybody is genuine to oneself. Even the establishment lacks the power to physically silence the offender. Galileo could have hired an army too. This sort of moralistic manner simply does not apply. In "Proof of...", did you not ruthlessly defend yourself from raving materialist offenders? The best, nay the only defence is a good offence. Everybody is corrupted by his own views. Indeed, I can judge you are corrupted right now in defending yourself from my challenge, and that you would silence me if you can...
Not all philosophy is corrupt. And neither is it impossible for someone to give a response to a challenging argument, without being defensively ruthless. I especially commend Fliption for this trait. His open-ness (even though he has no bias towards me or my philosophy) is evidence for me making this statement. I've experienced it. I know that my arguments can be discussed without a trace of bias.
Openness itself is a corrupted bias. Why must philosophy be open? Why must neutrality be enforced? Staying to the moderate is in itself an expression of extremist. And, in any case, the sense of the moderate is one that is governed by the one who judges. One who is open minded to one person may be biased and skewed to another. Do not pretend that you can be unbiased when judging someone else of their bias. If I was to challenge Flipton on his philosophy (sorry Flipton) of openness, I expect him also to be defensively ruthless.
And so what you also say about "What do you expect?", means that I say that 'corrupt philosophy' can only be conquered when all people try to debate such matters in a truly open fashion.
I'll make a proposal. Truly open philosophy does not work. It brings no conclusions, only possibilities that are equal. An open philosophy cannot challenge, it cannot conclude, it cannot prove, it cannot defend. It can only be irrelevant. In the creation of reason itself, we make assumptions on the world around us, and limit this openness. The reality of the world is a balance between an overopen existence, and a closed, insubstantial one.
As long as we remain defensive in regards to a philosophy which cannot logically sustain itself, then we also remain closed to a philosophy that can - if any such philosophy exists. But how would we know? We're too busy defending something, that cannot exist upon foundations made of pure-logic. That's the same for any philosophy. It's corrupt unless that philosophy is genuinely open to reform. The philosophers who created our current vision of things had to be open to reform. If they were not, then those philsophers are corrupt too.
But there is no such thing as pure logic. Pure logic is an entity that does not exist. All we have are imperfections, and the grinding race of philosophical survival. Progress is an entity that comes from restriction and direction, not from allowance. Without argument these philosophers cannot have changed. Without corruption and passion, there can be no argument. No philosophy can sustain itself without assumptions, or inductive logic. It is the rock of establishment that produces the challenge and the real willingness to change. And open door is and open door to chaos, undirected change. An end to the evolution of philosophy that really made our current vision of things. The fact is, only the strong survive in philosophy. It is important to keep it that way.
I say that ridding philosophy of its corruptiveness is a good thing. Who would argue with that statement, save the corrupt themselves?
And who CAN argue for that statement, save the corrupt themselves? Philosophy is dependent on what you term corruption.