The argument isn't if public sector workers are skivers and therefore should be fired
The argument is they bring no-money into the economy and the private sector which pays for them can't cover the cost.
Therefore like any company they have to be downsized.
If that means making people redundant or reducing pay/benifits/pensions etc then so be it.
Believe me like any company that goes through downsizing they will used it to trim the fat. The long term sick, the bs projects, the people sitting around doing nothing etc. If you are hard working and effiecient and worth the money, you've got a good chance of staying.
If the pay-freeze across the board is harsh on you because you believe you deserve it then leave and get a job in the private sector.
I was at a struggling company that layed people of and then tried to freeze our salaries, so I handed in my notice. The next morning they give me a pay increase of 5K a year. Obviously some people where pissed but my mate just said "Then do the same", that shut them up. lol
Ultimately you're not a slave, if you don't like it and honestly feel you can get more elseware then just leave.