I've not said that corruption is acceptable in any guise. I know nothing about the Christopher Alders case so can't comment on that.
I am saying that you cannot possibly link allowing a guilty person to go free, with this meaning society does not close its eyes to lying and corruption. The legal system does not fit nearly into boxes like that and there will also always be grey areas.
I am aware there are always grey areas petey, in every part of life and even on this forum but for all that an acceptance of corruption however 'noble' is unacceptable in my opinion because it is the thin end of the wedge. If the law allows noble cause corruption I still don't agree with it.
I accept that there are two different subjects lumped together in my post and it is a bit unclear, it would have been better as two different posts but it's hardly a hanging offence, do think you are splitting hairs.
May be worth reading up about the Christopher Alder case, it is something to behold.