This is an internal exploit only, 'cos you've got to get in thru the company firewall first.
....and if they're happy with that (and you can view files on the LAN) then they're probably not too bothered about you being able to see the printer config.
Printing the random documents you find in the cache is only going to get you ones containing Betty's shopping list and Barney's list of pr0n sites (as any fule no).
The best way to get a copy of sensitive data is always going to be this:
1, stand next to printer.
2, steal document
If anyone says that they've lost a document (and you want to keep a copy) then think about photocopying it. Then you can miraculously "find" their document in the pile of paper you now have with you...