I agree that the farmer should be the one who gets the payment - don't have a problem with that at all and agree with you.
Have been reading up more about it and it seems that farmers were allocated entitlements in 2005 as a one off exercise. The farmer could therefore use his entitlements in order to claim SPS on our land if he has enough (you need one entitlement per hectare). He has to have full management of the land though and be responsible for cross compliance etc.
We don't have any entitlements as we didn't have land / weren't farming in 2005 - but if we were to in future and wanted to claim SPS we could buy entitlements on the open market - which I assume is the naked acres that you are seeing at auction (i.e. entitlements but no land - to go with the land we would have, but no entitlements!)
Feel like I am emerging from a fog

J