It's true tho. When I moved from the private sector to working at a university, I doubled my salary. When I moved from there to working at the government, I tripled my pay from the uni job (moved from perm to contracting, however).
Out of curiosity, where was this?
New Zealand, followed by Australia for the government contracting. The town I initially lived in in NZ had a very poorly paid range of jobs going, at least at the time. However, I was trapped there, predominantly due to lack of money.