No, that's not it. They make sense as investments for things like pension funds because what those pension funds need is basically the other side of what's need

No, that's not it. They make sense as investments for things like pension funds because what those pension funds need is basically the other side of what's needed to have infrastructure like water and sewage treatment: the pension funds have a bunch of up-front money that they need to turn into a reliable income stream, whereas providing water and treating sewage has a bunch of up-front cost to buy/build/upgrade the infrastructure but only receives money slowly over time from people using that infrastructure. The British media has been obfuscating this because for partisan political reasons they want to convince people that having to pay for things that they directly use and benefit from is somehow stealing from them, and that the fair solution is for Canadian teachers' retirement money to be used to deal with their literal shit for nothing in return. So far it's been working astoundingly well.