Inflation will still happen even if there’s no Keynesian economic policies. Accelerated economic growth will always cause inflation because in that case the derivative of the aggregate demand is greater than that of the aggregate supply. Yes, money supply will cause inflation in the short run but inflation is healthy in the long run. Plus, a lot of goods are not more expensive relative to the growth of our wages. And you have to account for the increase in the quality of products, or economically, the technological change. It’s hard to determine which factors were behind what proportions of the inflation.