To blame "bankers" or even "RBS bankers" for the state of bonus culture is akin to blaming the excessive footballer salaries on the Accrington Stanley Under 18's reserve goalkeeper. It's public naivety of an industry where everyone is lumped in together and blamed together.
The credit markets were solely responsible for the crash. At the time of the crash, on average, an investment bank committed around 12% of staff to the credit markets. This already means that 88% of "bankers" have had nothing to do with the financial mess, and have worked hard at creating profit despite being lambasted for doing so. Further more, of that 12% of credit-focused employees, only a few of them would have actually had any investment authority - mostly traders and structurers.
In 2010, RBS had one of the worlds strongest Interest Rate Derivatives and Hybrids businesses. It turned almost £800m in one year. Subsequently, the politicians and the public threw their dummies out at bonus time and the senior members of the IRD and Hybrids business got screwed on their bonuses (compared to those at other banks, and also based on them creating £800m from nothing). They've since almost all left the business to join other investment banks where they're appropriately rewarded, leaving RBS (and the relevant investors and shareholders) looking at a shortfall of around £300m-£400m on that IRD operation alone.
Doesn't seem like sensible action to me. Seems like uneducated public outrage and jealousy.
It would be wise to factor in to almost all arguments about the crash and banker bonuses, that almost all members of the credit businesses that messed up - RBS, Lloyds, Morgan Stanley, UBS, etc. - don't work at their respective banks anymore.