Perhaps she had never realized that someone did the job for her. Luckily, she was reading bits of Mahatma Gandhi's 'My Experiments with Truth' then, and we crossed over several issues with the thought that Gandhiji cleaned his own toilet.
It's the same with our public spaces. Most of us assume there is someone to clean up. So, it's chuck, spit, pee, shit.
Read my review of 'Untouchable' by Mulk Raj Anand, here.