In times past the family invariably took care of it's own and in undeveloped countries this is still the case. Although for many people there can be no substitute for care given by their own family, the stress on those assigned the task can be overbearing.
Families are given little outside support for looking after their own. In my own case, the meagre allowance I received from the state to care for my parents wasn't enough to pay for the extra help I needed, until my own health suffered and the only alternative was a Nursing Home. Although they wouldn't pay me a proper wage, the state then paid the Nursing Home extremely well to care for my parents until they passed away!
I could write a book on the stresses that can affect both carers and their clients, dealing with the practical issues but more importantly, all the emotional strain they come under, because now I have the techniques to deal with that.
It's often easier for a professional carer like myself to do the job and with all the therapeutic training I've done in the last few year I'm now better equipped to deal with the emotional strain. At least when I'm employed to look after someone else's mother I'm actually earning a reasonable wage and when my job is done I can leave it all behind, which is what I'll be doing this time tomorrow!