It's not a "payout" for work, to keep the "job" analogy it's like the company giving extra disability pay for employees with special needs who need to, say, hire a sign language interpreter to help them at work....except for years it's been abused and people who had no need to hire anyone had been paying themselves to be their own "interpreter" using the bonus.
The justice bonus was NEVER MEANT to be 6 free scrolls, and it's essentially exploiting the system that allows players to use it as such. (I mean, comeon, think about how you're doing it, you're creating a alt character and murdering yourself until you get enouch counts to be red, then using your own character to kill him repeatedly to get justice points...you really think that was the intended use of that system?) It was meant as a payment system to pay people for protecting you without reducing what you recieve, and the pay works in such a way that if you get nothing they get nothing. It's a way to hire another player to help you, which from all the talk here about people getting raided and losing all their scrolls I can't really understand why more people DONT use it as intended, and bring along a few pvp'ers to help protect the spawn. (You know...like we used to way back when spawn groups weren't pure pvm characters and could actually fight off attackers, and 10v10+ skirmishes weren't uncommon in spawn areas).
Your job as protector is to act as a guard, not to continually heal up your tank so he can do a little extra damage and not worry about his health himself. If you're doing this, you're not filling the role as protector and I'm not entirely sure why you think you should still get the reward for doing so, the fact that you could before was purely oversight in the scroll/artifact dropping system, this patch fixes that bug.
And for those saying "but then if something happens to them i can't even res them!!" that's not true, a single res or a few heals will NOT get you a scroll, just like a raiding party will never get a scroll drop from just 1-2 hits on the boss (except for WOD hits, of course, but that's an outlier, there's nothing that counts that much in healing as you can't heal someone over their hp cap...) the only way you're going to get a scroll through healing is to be sitting there healing them for the entire fight, in which case...yes..you definitely helped with killing the boss and you SHOULD get a scroll drop yourself.