I don't get how you think banking staff from management up are not paid enough. Judging ability to repay is far from rocket science. They have not reinvented the wheel, they are not creating any extra or primary wealth. Mistakes are absorbed and no one pays the piper I mean talk about easy street. Overpaid and run for cover pass the buck that's all that springs to mind.You need to pay to attract the best. The taxpayer is the shareholder and the higher the value of a share the better the return for the taxpayer when the shares are sold.
These costs must be paid from income hence the higher interest rates.
We can't have it both ways ie low interest rates, low income and the best staff. You get what you pay for. You have to pay to attract the best.