There other "stickiness" factors. One is that the population is increasingly aged and the exorbitant cost of healthcare means a greater incentive to stick with an existing employer, and possibly even existing doctors.
The other is housing prices which are ever greater compared to median income. That makes moving a far greater financial hurdle, and making an initial purchase far more significant. (As a thought exercise consider how you would behave differently if house prices were a tenth of what they are now, or tens times as much.)
Education would seem to be another issue as (other than private schools) you have to move to where the schools are and then stay there.
I believe average lengths of employment at any one employer are also going down. Consequently the costs of movement versus the benefits of that period of employer are higher.
The other is housing prices which are ever greater compared to median income. That makes moving a far greater financial hurdle, and making an initial purchase far more significant. (As a thought exercise consider how you would behave differently if house prices were a tenth of what they are now, or tens times as much.)
Education would seem to be another issue as (other than private schools) you have to move to where the schools are and then stay there.
I believe average lengths of employment at any one employer are also going down. Consequently the costs of movement versus the benefits of that period of employer are higher.