I'm not advocating for Germany to go all MMT here, but negative bonds are a clear indication that government has ample room for debt financing. Germany has notoriously poor internet service, investing in broadband infrastructure could help them transition into more of a service economy, which would be a smart hedge as the slowdown in Chinese consumption led to a slowdown in consumers buying German cars and a contraction last quarter. Also as mentioned, all the European players are big on tackling climate change -- why not fund solutions? Instead, Europeans leaders like Macron have gone with the politically infeasible route of higher petrol prices.