Out of curiosity, how does that research assessment treat papers with multiple authors? Does it only give credit to the first author, or does it divide credit by the number of authors?
And then there is bibliometrics, the art of lying with publication statistics. Everything humans get wrong is even worse there. A. Aaronson is different from Al. Aaronson, right? No paper has more than 3 authors, right? Journals always count for something, conferences don't, right? etc.
In Spain, gift authorship (adding authors that didn't do anything, typically in a mutual arrangement) is not uncommon. Not predominant, but definitely not uncommon.