The lights are on there, but nobody's home. Even at the historic highs it was less than 7% of the employed, and that was back in the Clinton era when the economy is pretty much universally acknowledged to have been a lot better than it is now. That suggests multiple job holding is a good thing, not a bad thing. When people can get two jobs that means there is more opportunity to work harder to save for important goals and pay for them. No coincidence, either, that GDP was better then when more people worked multiple jobs. More work equals more GDP.
