It would be nice and I'll fully support it. But I think those outside founders would benefit more than Germany would benefit from them. For those who actually want to create roots in the country, create jobs, generate taxable income - well, for those the incorporation will be a very small roadblock. Tiny compared to everything else.
I‘ve been running my company in Germany for years and do absolutely zero paper work. Zero. As I said, I spent a few hours to incorporate and we pay external services to do the work to keep it running (taxes, insurances). And I refuse to believe that you don‘t have to file taxes in other countries, sorry. It‘s just ridiculous.