LPAs required where no personal finances

Good morning

My client is the beneficiary and trustee of a personal injury trust set up because he is on means tested benefits. The co trustee is his sister and he tells me all of his money is in there.

He is asking whether it is still worth him getting an LPA given all of the money is in a bare trust for him. My understanding is that trustee functions cannot be delegated under an LPA so would there be any point /advantage in him having one?

Many thanks
Deborah