I’m not an expert, but to hazard a guess, the debt allows financial institutions to extract money directly from government tax take. If I were them, I certainly

I’m not an expert, but to hazard a guess, the debt allows financial institutions to extract money directly from government tax take. If I were them, I certainly wouldn’t want that debt to ever be paid off, and indeed to get higher, so that I could keep collecting rent from everyone else in society.