High consumption, usually, eventually leads to investment. Germany has had a lot of bad investments, especially in infrastructure. Stimulating the economy by increasing the government spending is usually not the worst idea, as it will let the market decide on what to invest.
The opposite seems to be working in Argentina, sure, but I always quote Kuznets when it comes up: "there are 4 types of economies: developed, undeveloped, japan and Argentina".
As someone who studied economics and is doing wildly different things, I'm looking forward to see how the "DOGE" thing Elon is doing will change things. I bet it'll be for the worse, but there is a reason why I didn't become an economist at the end :)
