[notahacker]

There are correct answers to questions like "will redistributing income from group X to group Y improve overall productivity?" but they're neither necessary nor sufficient criterion for policy formulation. (Keynesians, like their neoclassical economist critics tend to be favourably disposed towards assessing policy impact based on empirical evidence; Austrians on the fringe Right argue the economy is too complex to act as a testing ground)

Questions like "is better aggregate economic growth a justification for disproportionate tax increases for these people?" or "if the bottom percentile are hungry, should feeding them take precedence over growth objectives?" are inherently moral