Ethically sourced goods with Fair Trade labels may cost more, but they help ensure better conditions for farmers in impoverished countries. And that’s important, considering how many things, like sugar and chocolate, are farmed.
I like to cultivate the attitude that, if I can’t afford something without relying on post-imperialist systems of exploitation, then I can’t afford it at all.
Chocolate is a particularly egregious example. The farmers in Ghana and Côté d’Ivoire are paid nearly nothing for all of their hard work, and many have never even tasted the chocolate which their labour produces. It’s not much better than slavery, and it’s all for a luxury. I think it’s worth paying a couple more euros for a bar of chocolate if it helps to change that.
I forgot to mention, there's an organisation called Slave Free Chocolate, founded in 2007. They aim to make people aware of child slavery in West African chocolate farms and work to eradicate it. They also keep a list of ethical companies so you can help support the farmers and avoid any exploitative corporations.