If you are a supply-side economist, you believe personal behavior and economic performance can be controlled by tax rates. If you are a Keynesian economist, you believe economic performance can be controlled by fiscal policy, i.e., taxes and spending levels. If you are a monetarist, you are terrified by this chart, because an historic, astronomical increase in money supply like this is certain to create terrible inflation.
For the first time, I really hope the monetarists are wrong, but . . .