But suggest people not reproduce or Logan's run and the pitchforks come out.
Too right! Yet only by (at worst) maintaining present population levels can a reasonable standard of living (and by that I mean a place to live and enough food to eat) be achieved.
I'm all for a maximum of two successful pregnancies and then BOTH parents should be sterilised. However if the second pregnancy results in multiple babies, you can keep your sextuplets or whatever they are (I'm not amonster).
I also think that people shouldn't be kept alive purely because medical science has the skill to do so, and if people with dreadful conditions decide they would like to die at a time of their own choosing, with their family around them, and before they lose the capability to make that choice for themselves, then they should be allowed to do so.
I don't favour an arbitrary "cull at x years", because there are people of 95 whose lives are of more joy and (arguably) value, than many people of 25.