Building the #1 best economy obviously shouldn't be one's sole purpose in life. But if you really think it doesn't matter at all, why not leave the developed nation you probably live in and find happiness in the third world. Or just ask one of the many people who seek a better life in the first world every year.
There's a troubling number of people in this thread who seem think that wealth creation and strong economies is some pointless goal that we've been tricked into caring about. Let's not forget that we work to build wealth for ourselves and our children. We've already worked so hard to build wealth into our buildings and streets and health and technology and culture. Apparently that's why you can dismiss the value of a strong economy from the comfort of your laptop/desk in the first place.
So you’d need to prevent that, but in order to prevent it you’d have to become somewhat isolationist, right? Sounds bad.
Though I’m curious if anyone has thought about how to prevent all of the expensive skilled jobs from leaving.
Have you played Civilization? If you don't strive to be "the best", eventually you're the guys with spears or even muskets being bombed by F-15s. In other words, lag behind the leaders for long enough and you can say goodbye to your freedom. That's basically how the XVI-XIX century colonization happened.