It's a bit more complicated since the airport is a joint venture between Berlin, Brandenburg and the Federal Government which all hold roughly a third of the shares. And while it's an embarrassing waste of money the german constitution stipulates in Art. 109 Abs. 3 Satz 1 GG that starting 2016 the federal government cannot exceed 0.35% of the GDP in new debts and and starting 2020 the state governments are not allowed to take on new debts at all. So we'll have the austerity you're asking for soon enough.

False equivalence. Germany actually has the money it's wasting.