[user104658]

The problem with saying "their kids should do it!" is that the age gaps simply often don't work out to make that feasible. If 90 year old Betty had her daughter at 20 and now needs looking after... That daughter is also 70 years old, and very likely not in the position to take on that role.

You also have the fact that the number in need of dementia care is increasing year on year whereas the available care is not increasing, and in some areas, decreasing. These people need professional care round the clock... Leaving them with family is simply not feasible. It's a ticking time bomb that is being utterly ignored.