Fair enough, we have to acknowledge his legacy on academic economics though. He might have opposed a continual increase in the money supply, but this did not prevent schools such as the "New Keynesian Economics" to argue that, since prices are sticky, i.e. do not adjust immediately, monetary policy is effective in increasing the money supply since in the short term the government/central bank can use it as a tool to reach their goals.
Discussion
Sure
MMT leans on him heavily to justify whatever they want to do
but maxis are just wrong when they call arbitrary monetary expansion a Keynesian policy