I was involved in a conversation as to whether MMT was left-wing or not. My standard comment is that it is neither left- or right-wing it just is. Is, in this case, is a framework for describing and understanding the mechanics of monetary systems and the consequences of various policy choices.
The left- or right-wing elements then enter the frame when we discuss the objectives that a government should pursue and how it might go about achieving those objectives.
So it might be construed as being a right-wing position if a person advocates running a budget surplus even though the private sector is clearly attempting to run a surplus and the external sector is in deficit.
The person advocating that position would, if they understood MMT (and hence the way the monetary system operates), have to admit that they preferred higher unemployment, more inequality and increased poverty rates to the alternative and that is why they advocated that economic policy stance.
They would not be able to engage in sophistry about reducing the burden of debt on grandchildren, or saving up for the future, or taking the pressure off interest rates or any of the other nonsense that the right-wingers deploy to hide what their underlying value positions are when they advocate surpluses under the circumstances noted above.
A left-wing position would clearly not tolerate unemployment above the frictional level and so would advocated increasing deficits under the circumstances noted above.
So MMT is not a statement of values but could underpin an extreme right-wing, free market approach or the polar opposite, or … plenty of positions in-between.
As soon as we get over that myth – that MMT is left-wing – the sooner more serious debate can occur.