They don't flee it. They suck it up and move elsewhere for money. The high paying jobs are in the big cities, like Boston. Most of them (all the ones I know who live in MA) want to move back and really don't like the culture here but that's basically impossible do to once you've built a professional network and started to raise a family.
I graduated from UMaine. It was a morbid and forgone conclusion that we would all be moving to the Boston area if we wanted to make big bucks in our field. It was about the money, nothing else. People will put up with a lot of shit to make a buck.
>but it's neither economically nor politically stable
Politically stable? What the heck is that supposed to mean?
Yeah, the republicans with their backwards social policy can take the legislature or governor if they the dems try to push dumb stuff people don't actually want. That's a feature not a bug. It means both parties actually have a reason to pander to the voters (i.e. do what voter want them to, stupid or not). Democracy requires competition. No, Maine isn't a one party state and I assure you you do not want it to be. The party distinction is a more malleable and relative one at the state level (i.e. a rural Idaho democrat may as well be a NYC republican). One party states are very good stifling any progress not condoned by powers that be of the established party only. It's all bread and circuses with the occasional consenting to progress at the last minute when it looks like they might actually be challenged. Trust me, you do not want that. That is bad for democracy.
There's a reason this law was passed in Maine and not MA or CA.
Maine's as economically stable as any other state that doesn't have an industry that basically prints money (and in reality those industries tend to only float a region, not a whole state, e.g. finance dollars are not helping Buffalo much, but that's not really important for this discussion).