I have to say, I haven't found it particularly difficult to find a new job that pays the same or even more every time I moved. In fact, I'm moving to a new role in teaching soon, which offers me more money for less responsibility than I currently have. The one advantage of teacher shortages, really, is that those of us with a good track record can pretty much name our price, and even some conditions.
Many school leaders are starting to wake up to the fact that they need to work to retain staff (because hiring new staff and training them up to standard is expensive!) and also to the fact that us "oldies" are experienced in getting decent results.
With a bit of experience and balls, you can reduce your workload considerably. There is a particular piece of paperwork I refuse to do in my current job. It's a way of proving that I am doing something, which you can just as easily see I am doing if you look in students' books. It would take hours of my time to then prove that I am doing what I need to and add nothing to student results, so I don't. I haven't been sacked, or even disciplined, over not doing it.
We have the choice between hosting clubs or completing certain duties - clubs beat duties hands-down, so I do something I don't have to prepare anything for and I am guaranteed a warm spot inside and an opportunity to talk to the kids and build positive relationships.
Of course, you cannot do any of this in your probation period. But once you're past that, when you have proven that you can deliver student results, it's possible to kick back. I find that younger staff are far less willing to say no to bullshit, though, or to prioritise, and so the vicious cycle continues.