Even it would occupy them 20% of their time, the issue with such a backdoor is what it can do to non-criminals (ex: loose the backdoor to an enemy nation state

Even it would occupy them 20% of their time, the issue with such a backdoor is what it can do to non-criminals (ex: loose the backdoor to an enemy nation state that would allow spying on all citizens, or allowing some party to eliminate opposition). I always find this "war on drugs" strange, considering they are so many buyers to make it worth. Annoy/treat/educate/understand the buyers, if enough people want something you will not make it go away by reducing supply. Or make it legal and make money from it as a state...