Tradeoffs in the opposite direction from what he is thinking maybe. China has an extremely low fertility rate that will inevitably burden their economy as time goes on, and the US’s population is only stable because of immigration. We can’t simply outwork a country with several times the population we have to draw a workforce from, and so overextracting human labor at a rate that leaves people too exhausted or busy to desire a family is just going to result in an even more constrained labor pool in the future. I’d be willing to bet that we’d actually eventually have a stronger economy in the decades to come if we were to collectively do less work.