My grandfather claims to have invented this concept, though there is some evidence that it belongs to much older vintage. The “ticket” in question here is short for “ticket to heaven”. It refers to the practice of visiting ailing relatives and friends who you know are not going to last too long. However, you believe that they would want to see you once before they die, and then believe that they may not die unless you go visit them. So, you decide to put them out of their misery, and go “give them the ticket”, or in other words, you play God by giving them permission to die.
That’s all there is to this. It’s quite a simple concept. Unfortunately, it lacks wider appeal, hence this appeal to you to increase its appeal. Be careful, though, sometimes if you say “I’m going to give XXX a ticket”, there is a good chance that people might think it’s insulting, or disrespectful, or that you’re being too arrogant. But yes, otherwise, I think the ticket is a rocking concept.
PS: I’m beginning to see some sketches of a movie script in here. If you want to further develop it, contact me.