It's not just that public-sector employees have seen their wages grow substantially faster than those in the private sector. It's the details of just what that growth means that rankles. When the economic environment makes a practice untenable, in the private sector that practice stops. What progressives refuse to recognize is that when it happens in the public sector, the only real change is everyone's taxes go up.
But by all means, please do keep giving politicians more power. It's worked out really well so far, after all.