Keep in mind that every time you start a new job you go to first year pay. You may have a decent job making say 60k or so and then you go somewhere else and back to 30k a year. Live well within your means and stash something for the inevitable lay off.
I'm starting a new job next week and taking a 60% pay cut. I think the qol is much better and in the end my pay will catch up and eventually pass my old scale, but it will take years.