What if Google includes click-through rates by users in its search rankings?
People in Spain wont be clicking through links to Spanish news sites via news.google.es so Google will algorithmically have no choice but to deprioritise those sites in comparison to e.g. Mexican ones.
Of course, we're both assuming that Google are even allowed to link to Spanish news sites in search results - when I search google it shows me an excerpt of the matching text; if Google have to pay the news sites to include that then it's illegal for them to include those sites if they haven't paid.
Personally I take the view that it's Google's website, Google's index and Google that succeed or fail by whether the results they show meet the needs of their users. So let them make the call and not politicians.