You may think they won't listen, you may get a copy-paste answer, but the pressure of disapproval & being watched is a thing. Look how many MPs have been on the fence about changes to PIP.
There's also an open consultation on the welfare changes that includes face to face events...
gov.uk
Pathways to Work: Reforming Benefits and Support to Get Britain Working Green Paper
This consultation seeks views on the approaches government should consider around reform of the health and disability benefits system and employment support.