I really don't get this line of thinking at all. In any coalition compromises are required. Yes the Lib Dems made a campaign promise not to increase tuition fees. But (and this is important), they DID NOT WIN the general election so therefore did not have a strong mandate for those promises. Somehow the Lib Dems get all the blame for increased tuition fees as if it was their idea. The blame for that should lie squarely with the Tories. They really pushed for it and were willing to compromise in other areas important to the Lib Dems to achieve it.