In the UK it is normal for both parents of children to work and the age at which people have children has increased. People - and let's be honest we mean women - are not necessarily available to care for elderly relatives.
The greatest issue in social care is staffing - why clean up shit & piss, have your hair pulled and your tits squeezed for £10 an hour when you can earn more on the tills in Tescos and access other benefits too?
Don't get me wrong - care work can be rewarding to but it's wrong that dedicated, skilled, compassionate people are so poorly paid. And I don't believe it is possible to fix the health service without resourcing social care.