Shirking responsibility in modern society

Saturday night a smiling man throws his empty beer can on the ground in crowded downtown. He bounces away conscience free.He turns to me to try to flirt as I stare at him with contempt. I verbally challenge him and he looks sheepish and walks on.
I wonder what makes people believe that as apparent tax payers, we can abandon good behaviour whenever it suits. One worrying excuse is that 'tomorrow someone will come along to pick it up'. Have we regressed to a hierarchical mindset, where others are our minions and where personal responsibility for our actions doesn't exist?

I went home that night disgusted.