It&#x27;s not common sense to freely experiment with policy unless you&#x27;re trying to sell a controversial progressive agenda (like, FDR in 1933). And I say this as a progressive who supports much of what he did. Applying sweeping changes is difficult and costly, and undoing them is even harder. For example, farm subsidies, which are generally unpopular, were put into place by FDR and just can&#x27;t seem to go away.<p>Fundamental changes to our economic policy would probably last dozens or 100s of years, and could not easily be rolled back even if they hurt the economy.