UK banks want to renegotiate the deal?

The grass is always greener as the saying goes. As a taxpayer I wish to see the banks return to their roots, they lost the plot and now they and their shareholders must pay the price for the folly which got them into the mess as well as the folly of accepting such onerous terms. They went into the deal with both eyes wide open, a contract is a contract, you comply with it and you will get out of it if the taxpayer receives what you promised. Now stop bleating and get us out of this frightening situation if you can.