I think the reliance on being able to adjust tax rates--especially upwards--makes MMT a non-starter politically. You'd basically have to remove the power of tax

I think the reliance on being able to adjust tax rates--especially upwards--makes MMT a non-starter politically. You'd basically have to remove the power of taxation from legislative bodies to unaccountable agencies, similar to how the Fed controls interest rates. And good luck convincing any legislative body to give up that power.