The U.S. should reform immigration policy such that any skilled person can move here. The U.S. should reform housing policy to create housing abundance. One billion Americans is feasible and desirable (https://www.vox.com/future-perfect/21449512/matt-yglesias-on...).

Or the US could reform by, instead of aiming for the biggest economy, aiming to be one of the best economies in which to live?

> US could reform by, instead of aiming for the biggest economy, aiming to be one of the best economies in which to live

Economies of scale mean these go hand in hand. (The cheat code is trade alliances.)