Because EU countries don't have mammoth sized, trillion dollar SW companies with a global monopoly.

If your country's software industry is comprised mostly of 10-200 person web shops and consultancies there's no real gain for the Goverment agencies to be in bed with them.

If you follow that thought through to other industries, what do you think Denmark learns of US military movement and equipment from the armies biggest heavy lifter, Danish Maersk shipping? It can't be much since outside the software world companies don't sift through every single piece of "cargo" and goes to show why you shouldn't trust foreign software companies at all, allies or not.

Err... https://en.wikipedia.org/wiki/SAP

Billion, trillion, shmillion, lose some, win some, it's all virtual. Not backed by anything real. I mean, you can see the house of cards falling down because of a sneeze right now :-)

Weird Ron Paul fiat currently pseudo-rant notwithstanding, SAP is a good example but an outlier. Pick a random multinational [b|tr]illion-dollar software company and it's going to be American most of the time, and from San Francisco most of the time that it's American.