But lethal injection costs millions of dollars. That argument would make sense if we still had firing squad-style executions in most states, but that's not the case.
The courts, jailing, dozen+ appeals and stall strategies, and public defenders are what make it expensive. If you've got them dead to rights, why waste time letting them argue semantics for the next few decades?
You also have the issue of killers like Timothy McVeigh and Nicolas Cruz wanting to be executed. Isn't it better to have them rot in a cell for many years instead of giving them the death they wanted?
"If you kill them, they win." Complete lib/capeshit. Kill them so they can't keep "winning" by being a drain on society.
Also, many families don't even want the death penalty, so it won't give closure to everyone in the case.
If they care so much, they can personally foot the bill for his permanent incarceration. It's just $50,000 every year, maybe make a gofundme. Surely if they love their murderers so much they can find it in their hearts to feed and house them? Oh wait, they just want to virtue signal that they love the poor wittle monster that has never and will never be a net benefit to anyone.
Better proposal, if you have a sentence of over 10 years, you need to pay for every year past that, or we fucking kill you. If you get out and commit another felony while on parole, we kill you right after sentencing, reform or die. 3 strike rule back on the books and in full effect, each repeat offense is a multiplier like the good ol' days. Send them on up to see if God has some mercy to spare them, they clearly have failed on Earth with what they were given.