alt Hacker NewsPeople neglect their duty all the time. That doesn't make it okay, and it doesn't mean we should find it acceptable.
Again, this is about creating a better society for everyone. If we operate a transportation system that is inefficient because many of the patrons do not want to use it because of quality of life issue, then all those gains from transportation efficiencies lost... they are lost and replaced with expenses instead.
This isn't a zero-sum game. When efficiencies are lost and instead become costs everyone becomes worse off, including the person sleeping on the bench. Efficiencies compound upon themselves. High-trust societies make people better of in almost every interaction, including folks who need assistance.
Man at the end of the day we're animals. When you deprive people in certain ways for long periods of time they act certain ways with high reliability. You can't blame them for that; it's like blaming the water for running down a stream. If you want to create a better society you need to give the water somewhere else to go. Duty and ethics are, frankly, useless ways to look at this problem, and all you'll achieve with this methodology is the brutalization of the already deprived. That's why I felt angry reading your comments. I figured that's what you really wanted.