Let me get this straight: I write the US system executes innocents, and you understand that to mean I'm in favour of such a system???
No, you suggest that too much time and money is spent on appeals and legal process before executing someone in the US (including the accomodation, food, security etc during their long time on death row) when the fact that people are being wrongly put to death only for new evidence to come to light after the fact sugegsts the opposite.
Well yes, there is, because if a week later you find out that evidence was withheld or a confession was bogus you can reverse the life-sentence. That's much harder to do with a death sentence.
That doesn't make any sense. If you want to give people sentenced to death greater scope to appeal than lifers, then logically at some point the lifer wouldn't have the opportunity to present the new evidence that the person facing execution would.
But if new evidence does come to light during a life sentence, it's grounds for an appeal.
In theory, I'm for the death penalty for murderers where there is absolutely zero doubt that they did it.
See, I hear this position a lot (supported both in theory, as in your case, and in practise), and I take serious issue with it because we don't have a judgement of "They definitely done it guv." We have guilty or not guilty. You don't give lighter sentences because you're not really sure. If you did have this kind of system, you'd have people sentenced to life appealing on the grounds of "You're obviously not sure I did it or you would have given me the death penalty." You might also end up with the situation where someone convicted of one murder was put to death because there were more witnesses, while someone who was convicted of 10 murders was given life because there were only two witnesses and no DNA evidence.
In practice, I'm against it, because things do go wrong, and as you say, a death penalty cannot be reversed.
That said, if there is a death penalty in place, I don't think someone facing life in prison should be any less entitled in terms of appeals than someone charged with a capital offence.
But in a situation where there is the death penalty then the person serving life will be more entitled, if they can show there is evidence that has been overlooked, irregularities in the trial, new witnesses etc. A person who has received the death penalty doesn't have that option, sot here is an unavoidable disparity there, as grave, if not more grave than the oen you are arguign against from the opposite perspective.
Obviously, spending 20 years in prison for something you didn't do is not as bad as being executed for it, but it's a serious enough mistake that it deserves to be handled in a similar manner.
But someone realising that you've been wrongly convicted 6 months after you began your life sentence is much better than them finding out 6 months after you began your death sentence. The point is, the more time there is for the truth to come out, the more likely it is to come out - which is partially why you don't get taken from this place and strung up straight away even in the US and why you instead go and occupy the most expensive prison cells in the country for a decade or so before they off you.