monetarist

Monetarism is a set of views concerning the determination of national income and monetary economics. It focuses on the supply of and demand for money as the primary means by which economic activity is regulated. Monetary theory focuses on money supply and on inflation as an effect of the supply of money being larger than the demand for money.
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Noun
1. an advocate of the theory that economic fluctuations are caused by increases or decreases in the supply of money
(hypernym) economist, economic expert
(hyponym) bimetallist

An economist who believes that changes in the money supply are the most important determinants of economic activity and economic cycles.