The problem is we live in a society now where everyone has a public platform to promote themselves (linkedin etc) and there are a lot of ruthlessly ambitious narcisists who put self promotion and resume building ahead of everything else.

So they muscle into a team lead or manager position and grow the team, because it looks good to post on linked in "hey I'm growing my team" and it doesn't matter if the team needs another person.

And who cares if the company is then stuck with surplus employees, not the person who hired them because they have moved on and up at another company.