Our apartment building here has monthly maintenance fees that everyone pays into every month to handle the common, shared expenses. The standard formula is one based on the size of the apartment, which at first glance might sound fair. But it's not...
The architecture of the building is that the largest apartments are lower down and they taper to smaller sizes as the building gets higher, this way everyone gets an uncovered balcony. That means, of course, those of us lower in the building have the highest monthly payments.
However, thinking about it differently, I can see one alternative formula that would most likely be more fair, basing the monthly payment on the floor of the apartment, the higher up you go, the more expensive.
Two of the major expenses are the elevator and pumping water.
Those of us lower down in the building, especially the family on the ground floor, benefit less from the elevator than those higher up. Similarly, it costs more to pump the water higher up, so again, the distance the water has to go is based on giving water to the higher up apartments and doesn't do much for those of us lower in the building. If the building was lower we wouldn't need to pump the water so high.
So, those higher up in the building get more benefits for less money, get better views, more quiet as they're farther away from the parking, and to top it all off (pun intended) they get to throw their trash down on our balconies.