Water is a natural monopoly (can't be efficiently provided by the free market). The temporary bonus to finances wouldn't even make a dent in national debt while causing long term economic issues (because it would be run ineffciently).
In the UK, many privatised utilities take subsidy from the government that is higher tan the cost to run them publicly. That's right, they charge consumers way too much AND take more govt money than before. Rail is the worst.
The only way to eliminate national debt is by genuine, sustained economic growth. Anything else is paper shuffling that doesn't combat the real problem CAUSING the debt of government spending more han it can earn [which would be true with public utilities or private replacements].







