All those other cases of escaped prisoners of war?

From WW2? Probably quite a few.

That were captured and escaped? In which pay actually was docked? In which they can remember and document this? That are still alive today?

That can't be more than a handful.

If they're not alive today, I believe their families will get the money. The Baby Boomers came to be immediately after WW2, so that will be quite the collection of families waiting for their money.