By running your lines on a shoestring budget, how else would you? The contacts have a fixed life time, keep your expenditures low and you can extract the highest profits. Long-term maintenance in particular suffers after privatization, because why would you, that doesn't align with your goals. And the risk is nill, because the government needs to provide the services so if things go awry you have little too worry about. They will have to bail the line out. Just find a way to move money from the entity to shareholders while you can and you're good, they are not clawing that back.