No, nothing pushes the pusher. Is something could push the pusher, then they would be the pusher and the one we now call the pusher would just be some sort of "assistant pusher".
I think Steppenwolf made a song about
The Pusher sometime back in the 70s.
Oh wait! That pusher was some kind of drug dealer. Sorry my mistake. carry on.
PS don't pay any attention to the heading that says it came from the 90s. That is just hype from the A-Pushers out there.