There are limits to how much a country can borrow. No one knows exactly how much that is because it varies by country and circumstances. When a country can’t borrow any more you get what happened to Greece a decade ago where they had to balance the budget suddenly and the economy melted down.

Your previous prime minister tried to push through tax cuts that the market thought would cause the deficit to be too high and they had to back off from those plans and get a new prime minister.