Sumner’s proposal is for the Fed to target potential NGDP. So if the Fed thinks that potential NGDP will increase by 4 percent per year, it would inflate the money stock by, say, 6 percent per year. He considers this superior to a monetary policy that targets the price level.
A basic problem with this from the Austrian view is that any monetary inflation and credit expansion will set in motion the boom-bust cycle. To avoid the boom-bust cycle, money production must be left to the profit and loss test of the market.
Here is Bob Murphy on Scott Sumner: