Whose administration brought moralistic frugality to the heady atmosphere of affluence and economic growth of the late 1920s?

It is Calvin Coolidge. Amid Coolidge's administration, the United States encountered a time of fast monetary development known as the "Thundering Twenties." He cleared out the organization's modern approach in the hands of his dissident Secretary of Commerce, Herbert Hoover, who vigorously utilized government support to advance business productivity and create carriers and radio.