So basically all of the times that MMT was applied in real economics it gave structural implications, see japan's case for example.
MMT when applied to "free markets" and democracies have long implications long term since one of the main ways to MMT people control inflation give the extra liquidity injected on the financial system is thru taxes, people aren't usually happy when they see on the news that their tax income it's going to be increased by 30% or they tax over dividends it's going to be 60%...
Does MMT deal with inflation? Yes, but to them it's not a problem at all
Does MMT deal with the nation's debt? Yes, but to them it's not real since money doesn't exist and government holds the monopoly for the money supply.
Is the debt getting out of hand? two answers, No and Yes, it depends in which angle you wanna take, one of them it's the monetary orthodox approach that deals with the ideia that if you borrowed something you have to pay because you made a deal and not paying breaks your trust. To them printing money is the cause of all inflationary evil.
On the other hand you have the not so usual people, who says that given the factor that debt it's not real because money it's not real you can borrow infinite, just get your magic computer and put a zero more on the number, isn't this the key to hyper inflation? not to them since you can control it managing the channels of transmission of the money supply and eliminating purchasing power with taxes.
On the same way they tax you today, from income, from dividends, from profit, just making the margins higher or lower depending on income bracket and how the government wants to behave.
Giving you a dumb example:
You have a job it pays you 100 coins the government tax you 20% then you're left with 80 dollars to spare, the only thing that interests you if coffee, coffee is 20 dollars so you can buy 4 packs of coffee.
But the government is giving incentivized credit lines for companies and a construction company launched a project near you, with free time you decided to have a second job let's say that pay's you more 100 coins.
Now you have 200 coins, but the government to dry the purchasing power from the money supply incresed the tax over income to 50%.
200 -50% = 100
Your raw income grew by 100%, your real income (discounting not considering inflation grew by 25%)
Therefore even earning duble the income as before you can only buy 5 coffees, given a real purchasing increase of only 25%.
