Had Brown not been seduced by the siren songs of his exclusively banking sector advisers during the crisis, and had he been bold enough to split the retail and transaction banking sectors from the wild buccaneers of the investment banking world, Darling would not now face the problem he faces today.
A tightly regulated retail banking sector, with deposits guaranteed by government, would not have a bonus problem. Normal profits would regulate both shareholder returns and HR reward structures. These 'boring banks' would offer the citizen and taxpayer a rock-solid national banking system.
Allowing the investment bankers to do exactly as they liked, with absolute freedom, on the other hand, would reap a rich reward for the Treasury (and us) from successful buccaneers - and no costs at all from those that fail, for just as their reward and bonus schemes would be beyond government interference, so would their losses be beyond bailout. Bankers would not flee abroad, and Darling would not be faced with destroying the city's risk culture by inappropriate regulation.
Now that Myners, Shitty Vadera and the rest are creeping away from Brown, their job done, he faces the ignominy of having thrown public money at the banks with as much zeal as his 1970s foreparts ever did to British Leyland or British Steel and with as little effect.
Brown's utter fiscal ineptitude must now be clear for all to see; why the nation ever permitted this greasy-haired Scots technical college lecturer to meddle with the nation's finances will be a puzzle future generations will not comprehend.