Okay, this would mean more trains, but off-peak most of the trains are
80% and more empty, and it costs nearly as much to run an empty train.



Not round here. About 80% full.
Seems you were thinking of London commuter lines.
Quite happy with my old folks buss pass thanks.
And off peak fares can be very cheap. Last week did South Lancashire
to Edinburgh return first class for £32. "Free" cofees, sandwiches,
cakes and biscuits must have been a good £10 - couldn't eat any more
even though the catering lad seemed desperate for passengers to eat
his stock before journey end.