It's not really 'habit and laziness' – we've all been persuaded that we must must must be forever in motion, clambering up the 'career ladder,' hauling ourselves hand over foot into the rarified heights of management, then moving again and again in pursuit of further gains. Nah. If you find a balance between a job you mostly like (or don't hate) and an actual life where you get to go home in an evening, see the kids, do the things you actually want to do, while getting paid enough to do them, why not stick with it? Your job isn't the most important thing in life and I'm not sure why we've made it so, it's another of those modern cons. I feel a bit sorry for the people who work all hours, sit up till midnight for pointless conference calls, interrupt their holidays, etc. They're handing their life over to someone else.
I could get paid more if I moved on, and there's days of corporate BS when I think about it (but there's security in the big machine and any other similar sized mothership with have similar BS), but mostly I have a reasonable balance of the things that are important to me and when I power down my machine in the evening, it's over.