That's true, but something needs to give - the rucks were an absolute mess, attacking or defensively and it made for a poor match.
If you infringe, you should get pinged. Get pinged repeatedly, go and have 10 to think about it and so on. Easy.
I didn't have sports ears at the game, so didn't know 100% of the time why the penalties were given - but no distinction should be made if its sealing the ruck, diving over, not releasing etc versus tackler not releasing, not rolling away etc. A penalty is a penalty in my book, and strangely enough, in the IRB's too.
Perhaps we could bring back rucking, and I'd assume the rucks would be a lot cleaner (per se) and involve a lot less individuals laying about or infringing.