As a non-German, I don't want to comment on a sensitive topic like migration, but my thoughts on the economic policy.
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- a special fund federal/state/municipal infrastructure is created, which will have a volume of 500 billion euros and a term of 10 years. This special fund is to be used for investments in infrastructure serve. This includes, in particular, civil protection civil defense, and transport infrastructure, hospital investments, investments in the energy infrastructure, in the education, care and science infrastructure, in , in the research and development development and digitization. 100 billion euros of this is to be allocated to the municipalities are available for the above-mentioned areas
I'm not sure if CDU/SPD has enough votes to bypass/amend the debt brake rules (from what I remember reading, it was written into the Constitution).
But Germany really needs this especially on things like rail (for public mass transportation), electrical grid (to connect Northern renewable offshore wind to Southern Germany), and digitization (hopefully not American spyware but European services like Linux, EU cloud, etc. ).
I don't see AfD supporting debt brake reform, because they present themselves as fiscal hawks (and I reckon AfD wants CDU to fail so they can pick up voters from them).
But the Greens and whoever else should definitely negotiate with CDU for spending on vital infrastructure like electrical grid, rail, energy storage, etc. German economy is wrecked right now due to lack of demand, and Germany has excess industrial capacity to build out these physical investments that will pay off in the future.
Also sadly for Germany, if CDU fails, next election you might be looking at AfD led government like what happened in Netherlands.