You appoint solicitors as having Power of Attorney over your affairs. The Solicitors Firm does NOT act on your behalf - the solicitors you appoint act as individuals. If those solicitors die or move away and become uncontactable than you have 'lost' the POA. (Different with a will - the Solicitors Firm will deal with that)
Is that a question or a Statement? I didnt think you could appoint an organisation to have power of attourney - it has to be named people surely A will is completely different - Power of attourney is acting in your best interests when you are unable to yourself. An Executor of a will is distributing your assets after your death in accourdance with the instructions you left
You can if a court decides it to be in the best interest of the individual eg one with a large wedge in the bank and a parasitic family trying to take advantage.
A statement - If someone appoints say 2 solicitors to have POA over their affairs and those solicitors die the POA is not taken over by the Law Firm where those solicitors were based. There will be many people who have appointed solicitors as their POA's not realising that if said solicitors pre-decease them no one will have POA.
