Central Banks can do a better stimulus. Canada's did: In 1938 there were no jobs in Canada.When WW II began The Bank of Canada bought Canadian bonds and paid for them with newly minted cash. The government paid the Bank interest on the bonds which then, because the government owned 100% of the Bank’s shares, was returned as dividends. It was near zero cost money which put everyone to work either in the armed forces, or working in factories to build tanks, trucks, airplanes and ships. The Bank later enabled The St. Lawrence Seaway, the Trans-Canada highway, new airport and sea terminals and facilities. The Bank also enabled the federal government to assist the provinces, territories and municipalities with major public works projects
It happened in the U.S, and Europe https://ellenbrown.com/2017/01/26/how-to-cut-infrastructure-costs-in-half/  
https://www.socialeurope.eu/2016/05/helicopter-money-old-novelty/