A government corporation is started by the government and is sort of like an agency. They usually don't work for profit. A private corporation is a company that makes profit from shareholders, enticing them to do a better job
One is corrupt, one might not be.
It’s become a cliché
that government would be better if it were only run by private-sector managers
using standard selling practices. But Jan Mares, who has been in both
environments, says it is not the same. Mares, who worked in the personal sector
in the chemical and manufacturing industries, and was the fossil energy chief
in the Reagan administration’s Department of Energy, offers 25 reasons why
government management and selling management are not the same.