Has Everyone Forgotten About Income Tax?

Tuition fee stupidity:

Vince Cable, the Business Secretary, confirmed that ministers were examining ways to make the new system more "progressive". He said: "High-earning graduates will be paying more later in their life, but in a progressive way relating to their ability to pay. There is an issue about people who go on to very high-earning jobs and who therefore pay off relatively quickly and we do have to think about how to find a way by which they make some sort of contribution towards low-earning graduates. It's a tricky technical problem but we're working on it" 

Higher earners pay more income tax (not only more but at a higher rate too). "Tricky technical problem" already solved.