Nonsense.
Self-sufficiency is a fantasy. I suppose you would have been all onboard with Pol Pot's Communist vision, where everyone was moved from their bourgeoisie Colonial positions and set to work, equally, as proletariat brothers in the fields of the new agrarian cooperatives, too. (Who needs doctors when we can all work in the fields and feel satisfied with a job well done, all our hands calloused with the tonic of honest days' work?)
I think you need to read up on a fairly important piece of work published recently by Adam Smith. Namely An Inquiry into the Nature and Causes of the Wealth of Nations, which examined in detail the consequences of economic freedom, the role of self-interest, the division of labor, the function of markets, and the international implications of a laissez-faire economy (which is the ineluctable result of every country being focused inwards on "self-sufficiency", with no external plan). Oh, and there goes the UN, too.