MOnica. You completely misunderstand MMT.
It isn't any sort of economic 'system', it is a description of how money gets into the economy. It starts from the basic fact that our money is a sovereign currency and is only issued by the state. Banks can issue money under licence from the state but as what they issue as loans is paid back with interest, while the money enables economic activity once it is repaid it no longer exists and the requirement for interest means that it actually withdraws more money from the economy than it issues. Only the money issued by the government, which gets into the economy through state spending, leaves a surplus in the economy because it is never fully recovered by taxation. Without that surplus the supply of money available both for economic activity and to supply a growing population, would become scarce.
I'm sure that we haven't reached our relatively advanced ages without realising that the state issues money. There was a great deal of government angst over 'money supply' during the Thatcher regime, I recall.
Your belief that the magic letters MMT somehow turn governments into irresponsible unrestrained money issuers defies logic. Why would it change what governments have always done?
The sticking point for most people is the logic behind the fact that MMT informed economists say that spending comes before taxation. It is contrary to the story, that taxation funds spending, that has been told exhaustively for decades which is repeated by most economists and economic commentators. But this story defies logic too. State spending, which puts our money into the economy, has to come before taxation because without it people wouldn't have any money to pay in tax.
This is what AI says
If the state didn’t issue any money into the national economy but relied solely on taxation to fund its spending, the result would be severe economic contraction or even collapse. Here’s why:
No initial money supply:
If the government never issues money, there would be no base currency in circulation. The private sector wouldn’t have any money to pay taxes or conduct transactions unless it created its own parallel currency or used barter.
Circular impossibility:
Taxes can only be paid in the government’s currency. If the state never issues that currency (through spending or another channel), there’s no way for citizens to get the money they owe in taxes. The government would effectively be demanding payment in something that doesn’t exist.
Collapse of public services and aggregate demand:
Without state spending to introduce money, there would be no injections of income into the economy. Private activity would shrink dramatically because there would be no public sector demand, wages, or contracts paid in national currency.
Deflationary spiral:
Even if the government somehow began with a tiny existing money stock and then only taxed to spend, the net effect would continuously drain money out of circulation (since every tax removes more currency than the government re-injects). That would lead to deflation, unemployment, and shrinking output.
Alternative monetary systems would emerge:
In practice, people might start using other forms of money (foreign currency, commodity money, local credit systems) to fill the gap left by the absent state-issued money. But the government would lose control over monetary policy entirely.
In summary, a government that never issues its own money and depends solely on taxation would create an economy starved of liquidity and unable to grow. In modern terms, this would make it impossible for a fiat monetary system to function.