I am not sure a POA should be done for everyone. They arent cheap and names change, you lose contact with people , they pass on or you fall out with them.
The first time my DF did one (without the families knowledge!) it was only with one person who he then fell out with. We had to put in a new application.
Although its not a particularly popular view we have a huge elderly population, living in houses that are too big for them, driving when they shouldnt be and denying that there are any issues.
It then falls to the children to try and sort this out and its a minefield. My DF was fibbing all over the place, to try and cover things up. His finances were in a real state and he was forgetting what he had done and blaming anyone he could (or pretending that he hadnt done something even though you could see he had signed something).
Having had 2 years of this for our own health and wellbeing we need to step in early, be firm, dont pussy foot around.
I think what would have happened if we had allowed my Father to continue to drive and not persuade him to sell his car, if he had fallen down the stairs because all of the crap being 'stored' on the stairs?
Without outing myself if cost nearly £10k to clear his house.