the subway’s perspective. The subway is focused on creating a safe and clean commuter environment
Well there’s your problem. Your subway organisation is myopically focused on making its own little corner as “well-functioning” as possible even at the cost of the rest of the city. It ignores the social harm it causes to whatever the next place is that homeless people decide to congregate instead (and the additional harm it causes to homeless people by forcing them to stay in less hospitable locations, and the additional harm it causes everyone in those homeless people’s vicinity because they are more desperate on account of staying in less hospitable environments and thus more likely to resort to crime).
Well there’s your problem. Your subway organisation is myopically focused on making its own little corner as “well-functioning” as possible even at the cost of the rest of the city. It ignores the social harm it causes to whatever the next place is that homeless people decide to congregate instead (and the additional harm it causes to homeless people by forcing them to stay in less hospitable locations, and the additional harm it causes everyone in those homeless people’s vicinity because they are more desperate on account of staying in less hospitable environments and thus more likely to resort to crime).