Governance, government and states are all different and nebulous within themselves. You can achieve governance models that better resist the consolidation of power while still operating towards the goal of the collective good. That alone does not denote nationalization, which is a particular form of statehood (often referred to as a sovereign state). Watershed governance is managed across existing levels of international, regional and local governing bodies, often with a high level of success to best ensure sufficient water is available for the communities within.
Definitely not saying it works pervasively, lots of jurisdictions work as plutocracies and have vacated any sense of public good. That some jurisdictions suck doesn’t nullify the possibilities of cooperation and public good being the foundations of good governance.