Dichotomy of water supply and privatization
Every human being enters this world with the inherent right to life. The corollary to this is the right not to be killed - perhaps God's first law, which he made after Cain killed Abel, according to the Bible. To live a human being needs air, water and food the most, all of which is found in nature.
Food was the first of the essentials to become private property. Air and water were free till industrial wastes polluted the atmosphere and the earth's water bodies. Ironically, the more science progressed, the more polluted land, water and air became. Humans, though, have kept using science to find new ways to treat water clean. Since water is the birthright of the people, governments across the world were responsible for its supply, till private companies entered the scene. And that's when all the trouble started.
Once nature's bounties began to be privatized and vested interests took over their control, people were left with no choice but to pay for things that for millenniums had been there for the taking.