The British public are not overly sophisticated in drawing policy comparisons. Thus they couldn't see why the government wouldn't let in a few tens of thousands of Gurkhas, whom they liked, when it had opened the door to a million alien spongers, whom they didn't.
And so they will ask why Brown can't lend a few billion to the Post Office, which they like, when he's ready to hand over several hundred billions to the banks, which they don't.
I reckon Brown's intransigence will lose him a another couple of percentage points in the next poll.
There's just no telling some people. Sigh.