Let's be fair here.
Firstly, the reason Northern Rock ended up in the situation it did was the result of management failings and insufficient oversight by the FSA.
Secondly, nobody (including other banks, advisors etc.) really saw the flaws in the NR business model until it was too late as everyone was so used to high levels of short term capital liquidity.
There is no reason why the government would have seen its collapse coming any sooner than anyone else (certainly not the FSA or Bank of England). When it happened, the government had to react quickly. For those of you saying they should have left it, that was not an option. Not only would the run on NR have resulted in a quick catastrophic collapse of the bank putting tens of thousands of people into default but the run on other banks that would almost have certainly occurred could have dragged other institutions under.
Where we have got to ultimately is probably the right choice. It protects all the existing borrowers and maintains certainty in the financial markets. The shareholders deserve nothing, least of all the funds managed by RSM and RAB Capital who are whinging the most (and only went in recently on the hope of making a quick buck). We, as tax payers are not paying £100 billion, or even £50 billion, or anything like that. That is merely the (potential) value of loans and guarantees out there. Only in the event of every single borrower of NR going bust would we be liable for a portion of that (the value minus the resale of homes, assets etc). If anyone should be complaining it should be other financial institutions like Bradford & Bingley. NR is open, taking in new business on attractive rates and guaranteed by the government - who can compete with that!
The government have, however, screwed up royally in their mismanagement of the process and especially the failure to accept the Lloyds offer at the outset, or failing to select a preferred bidder quickly to resolve the situation.