Jane,
I would first advise you not to get worried about PSLF. That will never get taken away because the backlash would mean every elected representative who let that happen would be voted out of office. Don't worry about that. It's not happening.
I would next advise you to truly calculate what you are earning by working a public job. I say this in that my siblings and friends who are public employees focus solely on the salary number when that is just the tip of the iceberg in terms of their compensation.
Two really close friends of mine just had a baby. From start to finish, they only paid $880 out of pocket--that is absurdly good health insurance compared to the public sector. For example, if my fiancee were to get pregnant, we would probably pay our deductible ($5k) out of pocket, and then if the pregnancy goes over into the next year, we may have to again.
So don't just focus on your salary/hourly wage. Focus on everything. What is the real value of your health insurance compared to the private market? What is the real value of knowing you (likely) only have to work 9:00-5:00? What is the real value of the other benefits provided?
Of course, getting back to this thread, there is a HUGE monetary value on being in PSLF.
If your student loan balance is $200,000, and your payments are $195/month while on PSLF, that means you will pay about $25,000 in loan payments over the life of your loan.
Meanwhile, if you got emotional and unreasonable and rushed to pay off your loans in ten years, that would cost you approximately $278,000.
More simply, being on PSLF is worth about $253,000 over the course of ten years, or about $25,000 per year. Add in the other benefits I described above and you are probably making great money at your public sector job.
Now, all that said, I agree with the above poster: if you don't like your job and can't stand it for another seven years, then bolt. Life is too short. But if this is purely a financial decision, and you currently enjoy your job (to the highest extent possible), you'd be clinically insane to go to the private sector until your loans were forgiven.