The fact that this is completely the opposite of their stated policy of taking care of indigenous people etc., seems to be an inconvenient truth for Fairtrade.
In other words, what Fairtrade claim to be is apparently rather different to what they actually practice; much the same as Rainforest Alliance - another organisation keen to 'certify' products in return for lots of money being deposited in their bank account by the companies benefiting from their endorsement.
Cadbury chocolate Fairtrade certified
http://www.odt.co.nz/news/national/93213/cadbury-chocolate-fairtrade-certified