There is simply no evidence for this. We lost our AAA rating last time despite some of the toughest austerity measures around. There is simply no evidence that our ability to lend is suddenly going to dry up and there never has been. The fundamentals of an economy matter far more than the deficit.
Every single debt has been dealt with by economic growth not economic contraction. There’s no logical reason to think this will be different.
“magic up” - where exactly do you think money comes from? Do you think we mine tenners out the ground?
Also curious how you reconcile this apparent super importance of the deficit with the financial data we have going back the last century. How many surpluses have we run and what correlation to our credit rating do you think it has?
<2% of GDP to service out debt is nothing compared to the costs of lack of investment.
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