Unfortunately it is not always possible for people to make Lasting Powers of Attorney (otherwise known as an LPA); usually because it has been left too late and mental capacity has already been lost.
An LPA allows you to appoint someone or even a few people to manage your property and finances and/or make decisions about your health and welfare when you no longer have the capacity to do so. If it is not possible to do an LPA then there is still something you can do, in these cases an application can be made to the Court of Protection for the appointment of a Deputy or Deputies.