It's time to strike
There seems to be a strong case for insurgency on the horizon. You sound as if you were once a patient who is now at his wits' end. Take comfort from the fact that you will not be the only one at the college gates making demands. But don't forget that college principals must be equally frustrated - first at not being able to implement the pay deal; second at the threat of industrial action. I know what you mean about passing the buck, but in the end money comes from central government.
There is a strangely conflicting policy in the sector of raising the bar while shortening the run-up. This can only result in ill-feeling, and even industrial action.