Red tape around Waikato river water for Auckland

[crab2]

thing is though, should they have to pay to have water from the river, I thought water didn't belong to anyone as it falls from the sky

It appears this is because iwi are making a claim on this.
Perhaps its because they now own lake Taupo and assume all water rights from its water?

seems like they want to own everything and get millions out of settlement claims, I'd like to know what they are actually doing to help their own with the level of poverty so many are living in given they have these millions