Problem is, if you're being fair, the 90% bottom that will actually have to do the work, also don't want to care for elderly.
A decent fraction would need to become nurses, and frankly, with less pay/worse conditions than they currently get. A small fraction will need to study a lot more so more treatments can be provided, which requires doctors and researchers. And we'll all have to do with less (much less) because this will cost a lot even disregarding wages.
The top 10% who hold essentially all the wealth in the world have very little interest in that goal.