The best macroeconomic automatic in built stabilizer and best key intervention in the Economy is Taxation investment.To be candid,sordid nature of taxes cut,reduction and increase cannot truly curb inflation and eradicate unemployment the way taxation investment could do.In this case there is no recession and bust cycle but only boom cycle in which you apply only technocession.There is no need for tax hike or cut for tax investment assume the off-fiscal responsibility.Then growth in govt.responsibility of public works,can be undertaking by sustainable off-fiscal public spending.Infact there is no need for welfare payment but only prosperity reserves and prosperity public expenditures and debt expenditures.Note that this mode of proposition assumes theoretical mode of marsolism applicable under dual financial system driven by dual macroeconomics,with the golden responsibility left in care of debt economy under control of central banks for microfinance worldwide or as federal credit reserve(FEC) in america.