Singapore Government Bans British Nationals From Adopting Children In Tit For Tat Move

Question: Why is the Singapore Government adamant in refusing to sign an international treaty that protects adopted children?

Bernama.com, 8 Jun 2014
Singapore has barred British nationals from adopting children here, reported local newspaper The Sunday Times.
The report said this is believed to be the first time citizens from any particular country are not allowed to adopt in Singapore.
The move is in response to Great Britain's decision in January to drop Singapore from a list of countries where it recognises adoptions automatically.
A British High Commission spokesman told the newspaper that Singapore was removed from the list as it has not signed the Hague Convention on Intercountry Adoption.
The Hague Convention on Intercountry Adoption is an international treaty designed to protect the adopted child's best interests.
Singapore has not signed the convention. Full story