Ok, new game to play. I thought of this as I was driving home last night. Simply complete the phrase, "If they can put a man on the moon ..." with some common problem or situation that you think "they" (!) should have solved by now.
(ETA: You can respond to a previous poster's question, post a new one, or both.)
So I'll start with the one that got me thinking about this yesterday ...
... why can't they invent an English toffee (buttercrunch) that doesn't stick to your molars?