PPR is widespread both in "modern" Europe and the other bits, equally.
It is almost universally a job creation scheme. The more south you get in Europe, the more job creation goes on, but airports generally are run like it was still the 1970s, with union-run job demarcation etc. Mention the magic word ("safety") and nobody can touch you.
Pilots are perfectly capable of briefing themselves from the charts. After all, you don't phone up an airport to get their ILS frequency
The only semi charitable explanation I can think of is for the case of "PNR Customs" which saves having a Customs presence during all airport opening hours. This is quite common in France. However, that itself is largely a consequence of another job creation scheme: different categories of "police" for different jobs. In the Croatian islands, for example, they somehow manage to use the same (1) policeman for all these jobs....
I could post the hilarious details, supplied to a Spanish speaking friend of mine, of why San Sebastian (Spain, LESO) no longer accepts international traffic despite being an international airport (briefly, they are unable to get the right kind of policeman to turn up for work).
None of this would be much of an issue if all airports published accurate fax/email details, and it is usually not an issue if you can speak the local language - excepting cases where the PPL needs to be obtained in writing (Corfu LGKR in Greece is one example which turned back a group of inbound pilots last year, who had obtained PPR by phone only).
Edit: PPR is normal for private strips, where you need the owner's permission. It is same in the USA, IIRC; when I did the IR in Arizona there was an airpark nearby and they did not even like people flying near it, and landing there was out of the question. There are also many strips which do not have full Planning Permission for aviation and operate under some concession, and they try to limit movements and discourage visitors. Some also are "PPR" under a deal with the local authority. But this does not apply to public airports which should be open to all, during published opening hours. H24 airports are rarely PPR/PNR but if you are not careful you can get into the $500-$1000/landing fee department