> Higher productivity equals greater wealth I agree with your argument -- IIUC you're invoking comparative advantage. But the two concepts above are fundamenta

> Higher productivity equals greater wealth I agree with your argument -- IIUC you're invoking comparative advantage. But the two concepts above are fundamentally different. Wealth is a stock, while productivity is a flow multiplier (e.g. A(t) in Solow model: http://en.wikipedia.org/wiki/Solow_residual http://en.wikipedia.org/wiki/Solow_residual). Saying "equals" is a bit adventurous, IMHO. Probably a bit pedantic, but then you do stress that that statement is on the basis of "mainstream economics".