What fallacy does the government sometimes use as justification to use an expansionary fiscal policy

Expansionary fiscal policy  
This is an approach that tries to extend the cash supply to empower monetary development or battle inflationary cost increments. One type of expansionary strategy is monetary arrangement, which comes as tax reductions, exchange installments, discounts and expanded government spending. Another frame is money related strategy, which is authorized by national banks and happens through open market operations, save necessities and loan fees.