Why does sg have the practice of parachuting generals into top positions in private companies but other countries don’t?

It’s such a familiar practice, like once a general leaves the SAF he is just handed out a ceo position in some company. Looking at their track records, I dont feel they are the exceptional talent that the business world needs.

Why does sg have this unique practice but not in other countries? In other countries, if an officer wishes to join the private sector after retirement, they have to go through the usual selection and fight for the position.