"Objectively, you couldn't be more wrong. The two don't even compare. Slaves were not paid, they were owned. If they left their employer they could be hunted down and brought back by force or killed. Any of us can simply tell our employer "I'm not coming back", and that's that..
Wage slavery refers to a situation where a person's livelihood depends on wages or a salary, especially when the dependence is total and immediate.[1][2] It is a pejorative term used to draw an analogy between slavery and wage labor by focusing on similarities between owning and renting a person.
The term wage slavery has been used to criticize exploitation of labour and social stratification, with the former seen primarily as unequal bargaining power between labor and capital (particularly when workers are paid comparatively low wages, e.g. in sweatshops),[3] and the latter as a lack of workers' self-management, fulfilling job choices, and leisure in an economy"