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Well, I don't know about Scandanavian countries, but the UK has certainly been working on currency issued by the government for decades. That's why, despite population increase over the years, we still have enough money to go round (even though it is very unevenly distributed). If the amount of money the country had was a finite, fixed amount, we'd all have about 10p each...
Consider, population of the UK in the 1950s, about 50 million. average wage probably less than £1,000 pa. Population now, 68 million. Average wage about £25,000 pa. Where did all that extra money come from? It wasn't trade because we've mostly had a trade deficit in the period 1950 - 2020. It wasn't taxation, because taxing £1,000 pa wouldn't produce enough to finance today's wages or the cost of public services.
Was it borrowing? Well, 'borrowing' is selling government bonds to raise money, people buy them as an investment or to save their money in a safe place because they know that the government will always be able to repay them. But some 70% of government bonds are held by UK entities, financial institutions or individuals. The money for them will come from within the existing 'stock' in the UK, so that's not increasing the actual quantity of money. Government pays interest on them, too, which diminishes the money it has available.
The government does count Quantitative Easing as 'borrowing' but that is partly where the con is. Because the Treasury (government) creates new bonds, which are bought by the Bank of England. the money is transferred from the BoE to the government account. But as the government 'owns' the BoE, it cannot owe itself money. The BoE actually pays all the government's bills. Even though it is shown in the public accounts it will never be repaid, it doesn't have to be. The bank rescue in the global financial crisis, propping up sterling after the Brexit vote and paying for the covid pandemic has all been 'financed' by QE. Non repayable 'debt'. In effect, money creation.
And that is how the supply of money in the country has always been increased. Not by QE usually, but just by the BoE 'creating' more money to put into the economy.
This can only be done by countries which have monetary sovereignty, the ability to issue their own currency. That's why it was a very good idea not to join the Euro, we would truly have given up a vital area of sovereignty. If we were to rejoin the EU at some point we would be wise not to join the Euro. We might have to 'say' that we would but then, Sweden has been about to join the Euro for years, still has its own currency...
That is why, when a party devises its manifesto and runs on it at election time, the question to ask is not 'How are you going to pay for it?', because things can always be paid for, but, 'Is this inflationary?' and 'How are you going to control inflation?'
That's why I say it's a game changer.