Postdocs need to be highly skilled, ambitious, and flexible. In return, they are frequently offered little more than autonomy in their work.
The term trainee has long ceased to be a synonym for long-term interns or low-paid career starters. Although trainees lag behind direct career entrants in terms of earnings, they often gain experience that pays off in their future careers.
Whether at a research institution or a company: scientific consultants and scientific managers are needed everywhere that scientific research is conducted.