First, let me tip my hat to you for being honest. Appreciated. "Several recovered next day [for elk = wasted animal except for horns] or not at all"? That should have spoken volumes to you about hunting elk with archery. And you didn't hang it up? Every meat processor I have known echoes your findings: lots of errant broadheads and very few bullets. I only encountered this once with the last bull moose I shot. It had been hit twice before with what appeared to be .22 magnum. Once in the neck, which mostly blew up in the hide, and once in the hump, which did essentially no damage (a moose's hump is almost entirely vertebrate bone). Undoubtedly the work of a preseason "grouse hunter" poacher. I estimate that a .22 magnum probably has about the same lethality potential as a broadhead. I admit to shooting that moose five times. The first in the neck, because in the deep snow laying down that's the only reasonably good target I had. It put him down. As I was returning to pick up my pack that I dropped during the stalk, I suddenly felt something was wrong and looked back. The bull was up but very sick. I put another one in his neck, not wanting to waste any meat. Mistake #1. Neck shots on big animals like that are as often as not nonlethal. Down it went. Back at the pack I turned to see it was back up again! And moving. I shot and knocked it sideways but it kept going into the thick timber. I tried another shot at it on the run and missed. At the bed there was blood splattered all over. On the track I found a big patch of long hair scattered on the snow, obviously from the third shot. He didn't go far before laying down next to a tiny creek in the trees. The bull was facing away so I put the crosshairs on his head. Bugger stood up just as I shot. Crap! I knew where that bullet went: right in his arse. Now my gun was empty so I ran back to the pack. Pulled out the box of ammo and stunned to see it was the wrong one. Just empty cases for reloading. Mistake #2. Wait ... I pulled the tray all the way out and there was ONE loaded shell at the very back. Whew! Back on the track I discovered the moose had entered a fairly recent cutting unit on the other side of the creek. I could see for a couple of miles but no moose in sight. Very quickly I ran onto a bloody pile of poop which confirmed it was shot in the butt. Bleeding a lot I didn't expect it would go far. After a hundred yards I found the moose laying in a shallow spot. He was head up facing away from me. Okay, this shot MUST kill him or I'll be stuck trying to finish the job with a very crappy Schrade Old Timer knife. I walked up for a close shot in the head. Figured that moose didn't have enough gas left to get up. Mistake #3!! I was less than ten yards when he jumped up. Just as he turned for me I shot him under the right eye. Happened so fast I didn't have time to get excited. Not sure if I even looked through the Springfield's 3x Weaver. Shot seven times total (including the poacher's hits) before the bull was dead. And I don't think two pounds of meat were lost. First two neck shots were almost in the same hole. One bullet was lodged in the spinal cord. Amazing! The third shot essentially bounced off his hip (angling away) and hardly scratched him. Fourth shot missed and fifth shot hit him square in the poop chute ... thankfully! The .22 mag in the hump was a bit infected but no meat up there anyway. I got lucky ... actually lots of lucky. Had it been earlier in the season and no snow, I very easily could have lost that animal. Another reason (a very GOOD reason) I prefer hunting late after snow is on the ground.
Recovering any animal that isn't dropped in its tracks can be dicey, sometimes even if it's well hit. And has anyone ever heard of an elk or deer knocked over by an arrow? I haven't. I do it all the time with my 30-06. Generally, bow hunters are out early in the season when tracking conditions are most difficult. I see absolutely nothing wrong picking on them with exclusive regulations to discourage wasting game. License their arrows as I suggested above. I strongly suspect doing that would very quickly weed out the chaf in that sport. I also suspect the big box outdoors vendors would put big bucks up to oppose it.