Low unemployment is not a useful metric for 2 reasons. First is it does not account for people who have dropped out of participating in the labour market. Second is the race to the bottom in many industries. The uberisation of everything is driving income inequality. Eventually if you stop watering the plants they stop bearing fruit. Our economy is all fruit (ie complex financial instruments generating even more dollars for rich people by moving money around) no water (livable income for the masses) these days.