4 years ago, 4 Norwegian girls came and set up a system where every room had a duty day when we empty the thrash, also we had a common fund ($1 each month) to buy thrash bags, dish washer detergent etc. After they left, it was a period of chaos (somewhat). Now the 4 Indians in my house set up a common fund as well (35ct each month).
I reckon it's social fairness in their cultural perspective of communal living. They don't get paid for organising everything, it's just a form of social leadership.