Going back to the earlier example, the mass of an electron does not  8  BIS central bankers’ speeches  change whether we are in the world of Newton or of Einstein. But in the world of economics, how firms, households and governments behave is altered by the reigning economic ideology of the time.
Because the world is changing, because we want to remain productive and competitive, because the very nasty development that we see on the horizon had to be addressed and for that, we need to spend money. We don’t want climate change to damage our countries. We want our kids to be educated.