Those writing their PhDs on the steampunk movement will probably not agree, but the modern movement to end global slavery is kind of political steampunk. The anti-trafficking movement has the drive to change the configuration of the world (though this could be said of any human rights movement).
Most importantly, some people in the anti-trafficking movement draws on the language of abolition to make their cases. Some people call themselves abolutionists and call human trafficking modern-day slavery. By drawing on our collective memory of the horrors of antebellum slavery, these activists are invoking an idealized past to comment on the present. Sound like a speculative-fiction genre we know of? Here are some pictures to illustrate:
While Steampunk is primarily a literary, fashion and technical movement, the Gaslight era also has rich veins of political commentary potential. Maybe anti-trafficking folks could hook into those sections of the culture with a stronger presence at fan-cons and more brass decorations .
“The blunting effects of slavery upon the slaveholder’s moral perceptions are known and conceded the world over; and a privileged class, an aristocracy, is but a band of slaveholders under another name”–Mark Twain