I also think it is a bit misleading to talk about "the private sector" and how hard done by people are. My OH was in the private sector (IT) and believe me the people in his company were on far better salaries, expenses, pensions and share options than anyone I worked with (at a senior level in local government.) I suspect that overall lower-paid staff do (or should that be did) have better pay and conditions in the public sector, but as I have said before, do we really want a race to the bottom?
It seems blindingly obvious to me that if profit, large salaries and bonuses for directors and earnings per share are part of the equation, then less money will go to the workforce.