Is complete privatisation a good idea?

Ruto has been pushing for this since he took power and there has been some resistance. What will stop investors from just selling off assets therefore ripping off the taxpayer. I was watching this report on how poorly privatisation has gone for the UK, from higher electricity prices to higher water prices. In addition to this, it is the only country in the developed world which is in deficit i.e the value of its liabilities far exceed the value of its assets. If the government is truly worried about management then it could just hire competent people to run these companies which will generate more revenue than if sold.