I hope that you meant, at most, the perl script. Be aware, however, that even this is not the first (or often the best) hammer in your toolbox. If you actually meant the perl executable itself.....

... ick ick ick. If I then have access to your perl suid executable, I now have root on the box. If I am using your suid perl executable for anything else, that anything else is now running as root on the box.

The concept of least privileges would use that tool (suid) for a very limited application, with a very tight environment - never for something as powerful as the perl interpreter itself.

Now, will it even allow itself to run suid root? I don't know if perl will allow you to shoot yourself in the foot hand a loaded gun, pointed at your foot, with a hair trigger, around a room of drunks, telling them that it is unloaded, while applying electric shocks to the person holding the gun just to see them twitch or not.