Many great companies are started overseas. Many great companies are also started in America. To suggest there is a correlation between startup success rate and at will employment would require, by golly, empirical data.
Do you have any on hand?
Do you have any on hand?
Leaving off energy companies, 9 out of the top 16 companies are American.
4.5% of the world's population, ~55% of the world's great companies.
I'm sure at will employment alone wouldn't crush the American economy. But it'd be a hit to it.