This whole topic seems alien to me. I've got to say, I can't really relate to the mindset where one half of a couple is able to retire, but the other half isn't. We've always treated our marriage like a partnership. We're a team. There's no "my money" or "your money," it's all "our money." When the pile gets big enough that we can both quit our j*bs, we will. Until then, we both have a responsibility to keep w*rking and adding to the pile. I can't relate to couples who keep separate finances.
I guess the only rationalization I can see for one partner retiring while the other continues to w*rk is if they can afford to both retire, and one spouse simply doesn't want to yet. In that case, there shouldn't be any resentment or angst about how the retired spouse spends his/her time. If there is, then the net-yet-retired spouse can just quit their j*b too, and join the party. Problem solved.