No parking brake?

[infernosg]

I finally got around to finishing the brakes over the weekend. I had purchased rebuilt calipers from Rockauto a while back.

After finishing everything I noticed no matter how much I adjusted the parking brake the lever was very easy to pull. Turns out the parking brake on the passenger side is not engaging. The cable pulls, the lever rotates but the piston doesn't move in the caliper. Normal hydraulic actions works just fine though.

My understanding is something is wrong with the self-adjuster in the caliper. Not having a parking brake on that side isn't a big deal but I'm curious if this will cause other brake problems if I don't fix/replace the caliper.