The quote is from a Norwegian public scrutiny. It is almost 10 years since it was finished. Since then the situation is only getting worse.

It seems in other words that Norway’s child welfare arrangements rest on a paradox. The child welfare authorities tend to use methods about which there is little, systematic research-based information, and which therefore have a high ‘uncertainty’ rating, or which we ‘believe in’ because ‘it’s what we’re used to’. The interventions have been in use for decades and we have neither managed to establish exactly how they work or replace them with something else (‘new interventions’).

http://www.nibr.no/filer/2006-7.pdf

From "pdf-site" 23.