Technically an investment to reduce future costs and debts. Climate change will cause costs and mass migration. Money spent to mitigate it now saves more money in the future.
if people thought those future costs were high enough with a high enough probability of happening they'd invest without being forced to
People can't be trusted to make that kind of decision. People tend to screw over their future selves. Our brains consider our future selves to be different people.
This mantra of "people not being able to make decisions", fosters dependence and inhibits taking responsibility. A fertile ground for manipulation and a root problem in our society.
It's not a out how people spend their money so much as people having their options limited by existing monopolies. If people can't buy an alternative it doesn't mean there is no demand
& the existence of government regulations or incentives do not prove there is free market demand. It shows there is political demand (far removed from individuals choices).
I agree removing barriers / manipulations is good (stop oil subsidies, stop clean energy subsidies). Beyond that you’d be telling people how to spend their money.
No one is preventing solar companies from existing. Anyone is free to start an electric car company. There may be economic limitations to the tech but that is a different issue.