I think that’s clearly out for Europe. A large part of its problem is over regulation of the labor market and excessively strong unions. These are precisely the factors that would prevent a sufficiently wide spread adoption of robotics. The 35 hour work week is emblematic of this — France should be working as hard as possible now because every day a smaller percentage of adults is non-retired.
Japan has a better shot because despite its over regulation it has embraced robotics from the early days (and indeed competed with the US for leadership in the area). However, I suspect that even there that while robotics are likely to be widely adopted and boost productivity this boost will do more to increase expectations than provide a cushion for the graying of the nation. It’s also difficult to see where the will to invest massively enough to make a difference will come from in a deflating economy.
Given that technology probably wouldn’t solve the problem and that there’s little chance of suffcient reform it looks like it’s going to be a bad few decades for Europe and Japan. But in one’s schadenfruede over dismal futures it’s important to keep in mind the aphorism “if it can’t go on forever, it won’t”. Those nations will eventually do something, it’s just going to be quite drastic because it will happen so late in the process.