Back in the real world, such activists usually would-be trade partners to provide childhood education and regulate working conditions as a condition of market access. As large, wealthy markets, territories like the US and EU have a great deal of leverage in such matters.
In practice, that solution doesn't work so well. Usually the goods wind up simply taking a longer boat ride through a country with looser standards before winding up in the US/EU.
The fundamental problem is Bangladeshi. It requires a Bangladeshi solution. High-minded westerners can help, some, but it might be smaller help than first seems possible.
This really does make a difference you know. You're looking at considering a couple of dollars overhead, yet it provides genuine support to the growers who made a commitment to pay their workers fairly.
The economic realities of Fairtrade seem different IF the Guardian can be trusted on this.
It seems like a common refrain in feel good politics. If not perfect, then none at all. It scales terrifyingly well from closing homeless shelters because they don't have approved handicap bathrooms all the way up to chocking off the economic output of entire countries.