I have no doubt that similar networks will be revealed in Protestant churches, in Buddhist and Hindu monasteries, in Moslem schools, as time goes on.

Catholicism is unique in having such a deep hierarchy - Muslim, Jewish and Buddhist education are locally organized, and most Protestant groups don't have many places they could transfer embarrassing employees to. There have been abuse scandals in the Haredi Jewish sect in London and to a lesser extent in Sunni Muslim medreses, but systematic coverups are harder to pull off. My yoga teacher as a kid (who was also a Protestant Sunday School teacher and a scoutmaster) ended up getting a jail sentence for a minor sexual offence, but he had no network behind him - and we kids all knew what he was up to, it was no surprise when he got done.

Hinduism has a gruesome record of child abuse in India. Buddhism rarely involves children in the West - there have been cases of sexually coercive sleaziness on the part of some leaders towards their adult followers, though.