Short version: work in physics is hard to find and unstable (which means jerking your family around--some of us value stability, contra Zuckerberg's values). Econ has interesting patterns and rules to be discovered, just like plasma physics.
Do other people remember quants on Wall Street? True, that was GIGO and most of the blame lies with screwed-up economic models the quants were given. Still, I'd look twice. Maybe three times.
It seems that the quant jobs weren't all they were cracked up to be. (One of the warnings in that last link is that living near the super-rich and seeing shops devoted to things you'll never afford makes even well-off people feel poor. Wealth is relative--who knew?)