The spring action of the hardware is meant to keep them from "wobbling" around in the caliper bracket whle cruising. They will also take the abuse of the pad working forward in the caliper bracket during brake application. This helps the caliper brackets to live longer. I haven't seen too many issues with this on Superduties, but other cars like Caravans and several other Dodge vehicles are very sensitive to this.
edit: Another tip. A light coating of Sta-Lube synthetic grease in the caliper slots and on the back side of the pads against the pistons will go a long ways to keeping corrosion down and it makes for nice, smooth, quiet brake operation. Just don't slobber it on and get it on the rotor or pad surface.