“The obvious reason for inflation is the government printed a zillion more dollars than it has. Velocity of money held constant.”

This is what @elonmusk said on inflation.

But you're wrong Elon, please see the graph below, velocity is NOT constant

Not only is it not constant, it's lower than ever, and ever since QE it broke its correlation with the employment-population ratio
@elonmusk

Also, keep in mind that all those dollars "printed" ended up in the banks, not the real economy.

The fiscal stimulus arguably had a bigger inflationary pressure here.

See the comparison btw base money and money in bank reserves @elonmusk