Any job that does not pay more than what it costs for a person to survive is slavery as even slaveowners make sure their slaves survive.
One of the main reasons the landowners of the Southern States desired the continuation of slavery so fervently was because it gave them a big commercial advantage over those countries that did not allow slavery (the cost of production being considerably lower if you do not share your profits with your workers).
Most of the world's production is now carried out by workers who, although free in principle, do not earn more than enough money to survive on. Many earn less than they need. Many are actually less well provided for than the slaves of the Southern States. Countries, such as Vietnam and India, where such slavery is endemic, allow this state of affairs because it gives them a commercial advantage over those countries where the workers demand to earn more than enough to survive on. Therefore, the multi-international companies and their political enablers, who move their production to such countries are engaging in and encouraging the continuation of the slave trade. Anybody who profits from the commercial enterprises of these companies (through share holding, interest on savings or pension provision etc.) are also guilty.
Are you a slaveowner?
The Church of England is.