There is no simple answer to this one.
Are bankers pretty much amoral? Probably yes. Are they any less moral than anyone else? Probably not. They are just a mirror of society's values in an industry where people have the opportunity to be overcompensated. How many people would refuse a lot of money were it offered to them?
Having worked as a banker for 23 years, there are some moral bankers and some immoral bankers, just like in any other industry.
The industry is changing and bonuses are coming down. A lot of compensation has to be paid in stock or deferred and large bonuses are taxed at a marginal rate of 52%. To give some perspective, a bonus of £100k, with 75% deferred (as it probably will be) will allow the "rich" banker to take home an additional £12k on bonus day. In addition, capital requirements against risk are going up all the time so it getting harder and harder for the banks to make the money to pay big bonuses.
To earn this money, your typical trader will be in 7 until 7, take 10 minutes out at lunchtime to grab a sandwich, and be expected to reply to Blackberry messages as late as 10pm. It is no longer a fun industry, more like a factory job, albeit an extraordinarily well paid one.
On the other hand, to pretend the whole financial system did not change after the bailout is to willfully misunderstand the nature of it. All banks were bailed out, some by actual taxpayer funds and some by softer support such as repo facilities from the BOE. And, finally, the government's explicit and implicit guarantee to savers stopped a real run on the banks which would have taken down the likes of Barclays (who always claim they were solvent) along with the worst basket cases.
The real problem is that the government did not put any conditions on the bailout and cannot really apply them retrospectively to private companies.
Who are the real mugs here? The shareholders. They have lost up to 90% of their money over 10 years, effectively transferring it to their employees. The big question is why is corporate governance of banks so bad and why do shareholders continue to accept the compensation levels available? That is not a question for the government, however.