MMT is the government claiming its "fair share" of the wealth stolen via inflation. MMT says that, as long as there isn't a hyperinflation of the money supply, deficit spending doesn't matter. Government can always issue more debt and refinance its loans.

That's what I've gotten from the shills who popularize this stuff, too.

But how can there NOT be hyperinflation if the government keeps inflating the debt? At present we're looking at national debt interest payments > the defense budget due to fluctuations in the interest rates.

Do you know how this deficit spending supposed to be extended indefinitely? Just because we never hit a wall yet is not a reason why there's no wall.