-All countries can't be net exporters at the same time. If Germany want to be a net exporter, somebody have to be a net importer.
-High public debt in your own currency supported by your central bank it's not problematic. High private debt is very problematic.
-For the same import/export ratio, if you reduce public expenditure, or the GDP will fall, or the private debt will grow. That's mathematics.
-The current agreements of the Euro-Area forbid investment in industrial policies. If Spain wanted to spend money in creating some kind of industry that compete with Germany and protect it until is competitive, it would not be allow to do that.
-Government spending in Spain could be better (if it was allowed, that it's not), but it's better than nothing, at least that you want the economy to collapse after a high grow of private debt.
-The program of support of the PIGS(1) public debt of the ECB is not to help the PIGS, is for protecting the Euro. The moment they stop doing it, the Euro is done. That's how well this currency union was designed, that if follows its rules it disintegrate.
(1) -By the way, it seems that we can call 120 million person PIGS and nobody think is a bad thing.