I wouldn't try to argue that anybody is overcompensated, I have no idea what you make or what you would make in the private sector.
But I do want to point out to you that I don't think those benefits are normal in private industry anymore. Things change by region, but if you mean paid sick/vacation time that is not so common anymore.
Insurance is becoming less and less common, and between DH and I, the last 6 jobs we have had ONE has offered any sort of retirement plan. I just want to bring it up because those benefits may not be the most successful argument if you want people to sympathize with you.
In the last 5 years or so much of the private sector has had not only pay freezes but pay cuts. Like the furloughs you have right now, but rather than having hours cut they are just told keep coming in, your check will just be for less now. The private sector has also been paying more for deductions. In the last two years the amount we pay monthly toward our insurance has doubled and this is normal in the private sector. Haven't you seen the threads popping up here about pay cuts and benefit reductions? It has been going on for years, now it's catching up to your job as well.
I'm not saying it's ok, and I do feel for you, but you really aren't alone and being picked on. You are just getting the media coverage the private sector jobs have not gotten.