system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why don't executioners use the easy and painless lethal injection of overdosing someone on morphine?
gpt
8th Amendment (in the US) prohibits, "Cruel and unusual punishment."

So that's a tricky when you are literally ending someone's life. But the blend of chemicals is supposed to simply put them to sleep, then stop their heart. That's really the most objective way to kill someone without cruelty. Getting them really high as they die is unusual, and families would likely protest the euphoria that they get before they leave this world.

There are lots of ways to kill a person, but letting them go to sleep and never wake up was less dangerous and expensive than a gas chamber, less messy than an electric chair, and less antiquated than a firing squad.