It's a couple of things I think. There are certainly those who won't do something simply because it isn't written down anywhere that they have to. That isn't just on the railway of course, and not just litter! However, to be more rail-specific, some TOCs can provide appalling examples of corporate laziness at times. Ask a Guard how often they've had to start a service with a train that's swimming in rubbish, because there are insufficient cleaning staff being made available to make the stock presentable. Or with toilets unserviceable because there was nobody to refill the water at the last turnaround point, or the CET tanks weren't emptied on the depot. Or with defects that haven't been rectified due to lack of time/staff/parts/enthusiasm on a depot. How often do we hear about BR-era stock with knackered aircon on here, slowly roasting staff and passengers alike every summer for the last 20 years? Why were SWT able to operate a fleet of Class 158s with working a/c, yet every other operator of the type still can't, for example? Sometimes companies ignore things, because they don't want to expend the time, effort or money to do something properly. There is, at times, a very valid argument that if people continue to go above and beyond to pick up the pieces, to do a job that the company should be taking responsibility for getting done, it only serves to perpetuate the lack of effort in resolving things. No doubt the same issue occurs across the board, not just within the railway!