I am not sure of our Goverments stance on a gratuitous payment but would agree that the parents (if the soldier was unmarried) engaged partner/wife be given a free ticket from taxes/respite care/medical bills for the term of their natural life.
The only sticking area would be partners out of wedlock or with no plans to marry there would have to be a caveat on the length of the relationship verses how much they receive it is a bit of a messy area this bit.

As you stated Mark they have gone the whole 9 yards and given all they can so we can enjoy our very comfortable existence.