The tax payer will always pay these salaries and pensions - that is what public service is. The public elected them. Many of these claims were made within the rules at the time. If you change the rules at a point, it doesn't work retrospectively. Imagine it, you drive down a road at 50mph for years without a problem, then they decide it is going to become a 40mph zone. You would be a bit hacked off if they decided to go after everyone who had driven down the road at a previously legal speed, wouldn't you!
You get a "Notice of intended persecution" through the post for an act last year that has just been made an offence?? I don't think so. Public servants may be an easy target, but they are still people and believe it or not, they pay just as much tax as everyone else, but they get no state pension.