Depends which bottom, and by what measurement. If you mean raise people everywhere above a certain wealth or income threshold, the answer is probably lower ener

Depends which bottom, and by what measurement. If you mean raise people everywhere above a certain wealth or income threshold, the answer is probably lower energy costs (and migration to places with stable governments). If you mean quartile/quintile/decile shuffling without regard for anything else, then aggressive taxation and enforcement will achieve that by some combination of wealth flight, redistribution, and suppression of upper incomes. Western societies appear to prefer a version of distribution shuffling that is accompanied by prosperity, which means moderate taxation and various targeted policies.