Apparently, this is currently the #1 political issue in the Netherlands, with the dutch prime-minister defending the practice and the UN investigaging. Sending 'inspectors', even. The dutch WMD's.
Btw... this Saint Nicholas is the original 'Santa Claus' (which was based on a mixture of the dutch and English St. Nicholas. Santa Clause in the US seems to have become a fat-bellied bearded dutch sailor, at one point, having lost his catholic bishop's trappings, and sometimes becoming smaller (like an elf) and fatter. In the 19th century, he got some other trappings (sled, reindeer, living on the north pole, elf helpers) through popular poems for children. And, of course, he became really well known when he was adopted by Coca Cola in the early 20th century.
The dutch and Belgian one has his black slaves. But there are other St. Nick's in europe. In some places, he has black-devil helpers. In some places, the Santa's put up fights with each other, scare children and run around trying to squeeze the buttocks of women.
The dutch and belgians now get 'claus' twice. One being the slave-owner, the other being the Americanized Coca Cola one, re-imported back to Europe. So, now they have two of the perverts.
Anyway... I am really glad that the UN takes it upon itself to try to intervene in the debate about local customs like these. I am sure it will earn the institution great credibility and love.