It's not strictly necessary to be a super power.
I don't think idleness is what's preventing it anyway. It's more about capital ownership. I'm not deploying high speed rail because I expect it would be impossible to get the land rights, not because I wouldn't work enough hours.
Actually I myself would be a terrible entrepreneur in any field, but I feel that I produce good value at a good rate at the actual work that I do. I don't think there's a shortage of entrepreneurship even though I happen to have none. I do think it's not being deployed on things that make the country more powerful.