This situation can be seen from two contrasting points of view.
From one side, it is not fair and it is cruel that the people are charged fro the basic things that enable them to live. The water and the oxygen are both natural resources, not human made, thus they should be free for usage for everyone.
On the other side, the people that use these water and oxygen bars are also responsible for the pollution of these natural resources. The majority of the people that live in the urban areas are not able to get clean air, or clean freshwater, so certain companies are doing that for them, thus it can not be seen as unfair as the resources that the people can not get are brought to them.