Is this what will be tried to fix the potential fallout from continuously decreasing fertility rates (resulting in population decline, thus affecting the consumption-based economy)?

Nope. This is just greed to make most of the moment without any thought for tomorrow. Nobody knows or cares where it takes us, but everybody knows that there is money to make today. So you need a model to analyze the economy with greed as the only driving force without any foresight. Add some parameters to account for monopolistic forces, human desire to be lazy and dumb thinking it is progress, and losing all biological senses to devices. That may give a better prediction.