>But it's hard to move out of the equilibrium.
I don't think it's so much an equilibrium so much as a battle, denoted by "friction," but I'm sure it would come down to each saying the other one defected first. I think we can figure out where the disloyalty started, calculated from the first principles of capitalism.
It goes both ways. The current equilibrium, at least in the US, is that (SW/IT) engineers leave after ~2 years, and it's causing quite a bit of friction. But it's hard to move out of the equilibrium.