I understand your frustration, but let's be realistic, charging "more" for resident sheep tags will do something. Case(s) in point: we have two threads that are active on this forum that are about guys killing unexpected rams, one on a moose hunt, and one on a caribou hunt.
If a $300 sheep locking tag was required, there is good chance that those two rams would not have been harvested.
It seems pretty clear that weather and predators are the two biggest factors in the decline of sheep populations(does anyone disagree?. Managing hunter numbers does nothing to address these two problems.