I'm not claiming I'm immune to this either, but to say one party is more corrupt then the other will often follow whatever party line you subscribe to. People will tend to excuse and put less scrutiny on the things the party they support does, and will even see many of the things they do as somewhat justified as it supports an ideology they subscribe to anyway, where as the things "the other party" does will be magnified much worse because not only are they corrupt, but they are corrupt in doing things that one generally opposes from the very start.
The stink the liberals left after the Chretien and Paul Martin era is what led to Harper being in power for as long as he was. The stink that Harper left in his time in power has now paved the way for Trudeau to do what he is doing. Give it another term or two, and / or a viable leader in the opposition, and the winds will change again. The wheels of corruption will continue to turn....
Thank god no one party is in power in perpetuity as the longer they are, the things they do seem to get worse and worse.
(not jaded at all)