MMT was developed by accountants and lawyers. I think it is an excellent description of how the monetary system functions, but as a prescriptive paradigm--how we should approach the monetary functioning of the economy--it does seem that in it all that matters is that the numbers balance like numbers on an accountant's ledger. It seems to ignore the real-world implications of those numbers for human beings, such as raising taxes as a response to price inflation: I phrased it as a question, but government would have to run a surplus; otherwise, the money would be being recirculated through government, increasing total income and therefore total demand in the process.