Do the perps get prosecuted? Do the places that buy stolen copper? Is it publicized? Are punishments large enough to provide a detriment? Are repeat offenders properly contained long term? No? Well then ... it's a mystery
the TL;DR here is the theft is a second order effect that you're not going to stop because the people that are doing it are horrifically addicted to meth which overrides any idea in their brain but doing something to get them more meth.
