when did comfort = exploitation?

I know there are even more hideous stories around the world, but somehow the thought of 50,000 to 200,000 "comfort women" (what an outrageous euphemism) enslaved by Japan's military in the Philippines, South Korea, and Taiwan during and after WWII, and the explosive popularity of their services amongst American troops during the occupation is the most abhorrent thing I have read in a while. Those women could hardly have fought for themselves, considering the culture they came from and the obligations they must have felt to their impoverished families. Even recently, not a single Japanese woman felt justified or unembarrassed enough to step forward and claim an official apology and compensation from the Asian Women's Fund, which was just closed. But just take a look at the attempts male authorities made at justification: "Sadly, we police had to set up sexual comfort stations for the occupation troops," recounts the official history of the Ibaraki Prefectural Police Department, whose jurisdiction is just northeast of Tokyo. "The strategy was, through the special work of experienced women, to create a breakwater to protect regular women and girls."