That year police arrested at least six activists, including Akter, on charges of instigating workers to vandalize factories. They were later freed, but some charges are still pending.
The activists are also angry that police have made no headway in the investigation of the death of a fellow union organizer, Aminul Islam, who was found dead a day after he disappeared from his home in 2012.
"Islam's case is going nowhere even though police say they are investigating," said Akter.
On Sunday, the government set up a new minimum wage board that will issue recommendations for pay raises within three months, Textiles Minister Abdul Latif Siddiky said. The Cabinet will then decide whether to accept those proposals.
The wage board will include representatives of factory owners, workers and the government, he said.
Bangladesh has 5,000 garment factories and 3.6 million garment workers. It is the third-biggest exporter of clothes in the world, after China and Italy. China lacks independent labor unions for all industries; the only legal unions are controlled by the Communist Party, and workers complain that they fail to represent their interests.
Since 2005, at least 1,800 garment workers have been killed in factory fires and building collapses in Bangladesh, according to research by the advocacy group International Labor Rights Forum.
In November, 112 workers were killed in a garment factory in Dhaka, the Bangladeshi capital. The factory lacked emergency exits, and its owner said only three floors of the eight-story building were legally built.