So..... imagine that you have 10 schools and one of them is failing and has had lots of government investment in it. For every successful child that gets 5 GCSE's the government gets back part of it's investment, because the child goes on to work hard and pay taxes or whatever. And if the school fails and closes then all the children are condemned to no education or one so bad they will never get a job and will be a burden on the state.
So, it's extreme, but it happens.
Now imagine what will happen in that school if the government turned round to the teachers in the failing school and told them if they had done their jobs properly the school wouldn't be failing so it's they are going to cut all the salaries in that school by 70% - including the salaries for anyone who joins that school from another one?
How many good teachers will join that school to turn it round? How many of the good teachers already at that school and trying hard will stay? Some possibly of course, but would you advocate that cutting the salaries of anyone who works in a failing school is the best way of turning it around? Of course not. In fact you pay the really good people more to go in and turn it round.
Just because we are talking about bankers and not teachers does not change the underlying rational here of how you turn an organisation around. What is different of course is that the people involved already earn loads of money and are certainly not altruistic in nature nor deserving particularly of sympathy. But if you create an imbalance such that all the bankers in one organisation earn three times as much as in another, then the good bankers will certainly all move to the high paying organisation, leaving the crap people to fill the places in the low-paying organisation. Which doesn't really achieve the long term objective of earning back the money the government has spent (but it will of course bolster up all the competitor organisations, and lead to them earning lots of money).
Of course, you could just say 'let it fail, and we'll see what happens then' or 'cut the salaries and we'll see if they all leave' but what's the risk here? If you get it wrong the taxpayers (YOU) lose everything and your own taxes go up. If you pay the bankers market rates then it sticks in the throat but you might actually get some money back. Your call, but I don't see the point in cutting off your nose, generally.
Of course, the argument of whether bankers get vastly overpaid in general is a valid debate to have. But that has to happen on a global level and not a local one. Just as you can also debate whether nurses are vastly underpaid relative to their merits. Most normal people would say a resounding yes to both questions. But the world has learnt that if you increase nurses salaries in one country (eg UK) relative to the rest of the world then the places where the good nurses are needed most (Africa) find all the best nurses upping sticks and moving to the UK, thus depriving the desperate nations. In that sense, bankers and nurses are similar - the best will gravitate to where they are appreciated most and rewarded most, the worst will drop to the already deprived areas. RBS is our Africa, in the banking sense.
Anyone who says 'I'm sure there are plenty of people to fill their jobs' is correct. There are. But would you rather have good people looking after your money, or the crap people who can't get a better-paid job anywhere else?
I don't work at RBS, but where I do work I am hiring at the moment, And 90% of the applications I have in front of me are from RBS people (good ones) who are desperate to move out because they are not being paid the market rate, and are totally demoralised because of the ear-bashing they get from a hostile media and demotivated because they see their good colleagues pouring out of the door.