The host reminded viewers that brands like H&M, Zara and the Gap are still producing their products at low prices by making use of cheap labor abroad, continually finding themselves in trouble over labor laws and outright abuse.
"As great as all these stylish cheap clothes are, at a certain point it's hard not to look at those prices and ask, how does any clothing company make money?" he asked.
"Although let's be honest — you know the answer to that," he said.
Oliver confirmed that U.S. outlets produced the bulk of their products overseas. He ran through the history of outrage and protests in the 1990s over Gap, Nike, and Kathy Lee Griffin's own clothing line.
Considering that unsavory practices still go on, Oliver decided to try and rename some brands appropriately.
"American Eagle should really become Bangladeshi Swamphen," he suggested. "And Banana Republic should really become – actually, that one is fine."
The host proceeded to expose the continued labor violations.
"I guess at this point it seems that sweatshops aren't one of those '90s problems we got rid off, like Donnie Wahlberg — they're more like one of those '90s problems we're still dealing with, like Mark Wahlberg."
Watch the clip, courtesy of HBO: