The most disastrous thing about the UK's covid spending wasn't the money, which isn't a debt, because that is just accounting fiction, it was the way it was spent. £billions fraudulently claimed and not recovered, £billions spent on Track and Trace, including the development of a useless 'app' and £1,000s a day on 'consultants, goodness knows how much on contracts with tory cronies for useless PPE by way of the VIP lane, and 'Nightingale hospitals unused because there was no-one to staff them. In a word, government incompetence and corruption.
New Zealand, let us remember, hadn't cut its ties to its biggest and nearest trading partner and market with a resultant annual loss of 4% of GDP...
Nor did they elect a corrupt, idle, money grabbing charlatan for PM...