Rhole's right, I doubt points would make anyone suddenly decide to help with an objective if they weren't helping before. I also don't see it being very comforting if you get points for trying to carry the objective, but your team still fails the mission.
Also, escorting the guy with the package isn't always the right thing to do. I think a lot of times, especially with banshees, that it's better to try to get aggro and run them away.
Not that I'm saying it shouldn't give points. I just don't think it'd really do anything.