We examine critically the nature and extant model of public Finance laid bare in this treatise and proffer innovative solution in this context tax investment to make the challenges of budget deficit and reckless direction of public expenditures,a historic forgone.The blogger ibikunle laniyan in the new macroeconomic ideology proffers ways forwards. The sources of public finance using america as a case study creates the legal framework for the fiscal Policy to run the administration of government and its political machinery.The control of the economy is strictly run by the direction of fiscal policy.Depending on the theoretical framework through which it basically functions,finding appropriate policy should not be a daunting task though keynesians may think otherwise.During the Rooseveltian times when the policy was still at its elementary stage,public spending stood at mere 10% of total national output during the great depression and accelerated to 35%by 2000.We do not agree that it ensure and guarantee better control of peoples destinies nor rational to say citizens are absolutely dependent on public spending or wherewithal of government.