Before AI they had to actually put in work, or at least play games of trying to steal credit from other people without getting noticed. Now that AI appeared, they see it as the ultimate way to take credit for work they didn't do: Put everything into Claude, let it do the work, copy and past output back to someone else. Minimum effort invested, maximum visibility achieved.
It will continue as long as they think they're getting away with it. If managers aren't willing to intervene, or worse if they encourage this due to the volume of output that seems to be appearing, it's only going to get worse.