Rob,
Ah yes, if I’ve read your last para correctly, you’ve hit the nail on the head.
ONS classifies “economically inactive” as quite separate from being “unemployed”.
My understanding ( correct me if I’m wrong here anyone ) is that if a claimant does not commit to demonstrating he/she is actively looking for work, then they can potentially (lol) have their benefits stopped. So they then get lumped into the “economically inactive” bucket without hurting the unemployment stats. Cute.
It doesn’t surprise me that any of the main political parties fail to point this out to the populace in general. They’ve all used this kind of trick to disguise their own failings.