I think this is useful advice for individuals. It's also important to know that even if everyone truly followed the advice, some people would lose out by no fau

I think this is useful advice for individuals. It's also important to know that even if everyone truly followed the advice, some people would lose out by no fault of their own (for instance, capitalist economies as they currently function do not sustain full employment without government intervention - it boils down to simple accounting identities). Macro outcomes often are determined by other forces than the sum of individual actions - just something to keep in mind when you see advice for individuals.