You seem a bit hung up on this. I think what you're missing is this: you're assuming there is a difference between Labour and Tory; there isn't, they are just two factions of the ruling elite. There only practical difference is one is the party of government, and the other is the subs' bench. The Telegraph is a traditional supporter of the current subs' bench. However, even they have had to admit that they're all up to their necks in this.
You want "balance"? Well, Labour is the party of government. 12 years in power prior to this news breaking.
What we're seeing, though, is what happens when you allow power structures to ossify. Yes, we fully expect the moat and chandelier brigade to rob us blind, but look at Michael Martin; he isn't from that background, but, by Louis XIV, has he joined it with alacrity. That's what happens. That's what happened to the Labour party over its history; it may have been about working class representation in parliament to begin with, but very soon it became about parliament's representation to the working class. Now it's just another ruling elite faction.
Which paper would you prefer this story to come from? The Guardian? What difference would that make?