This discussion may contain spoilers!
The universe of the Walking Dead reflects a desperate world where each inhabitant has the ultimate goal of survival. Of course, it's not easy to do when every corpse has your head on a plate. In order to live, these select people need every factor available to carry out their day-to-day existence. This would include utilizing every good available like medicine or food, but what about labor? Within this region of brutal lawlessness, where a woman shot down another in cold blood for nervous suspicion, how has no one thought of the alternative to indentured servitude? In the mind of any sane person, this is a dehumanizing and indescribably cruel action. After all, physical threats are the root of this particular relationship. Removing violence from slavery is like getting the white out of rice, so it's obvious that successful forced labor always resorts to threats at the sign of utmost opposition. It's terrible, it's horrific, and it begs to question, "How has nobody thought to use this?"
Now obviously, this is a game, not real life; There are limitations on what programmers can accomplish. In my home of the Midwest, slavery is an extremely touchy subject. Any mention of it and someone gets branded as a racist. Telltale definitely doesn't want to outright declare racism, but their characters can. Lee flat out accused Larry of being a racist in Season One, and happily, the community didn't throw a giant hissy-fit. Why? Because the situation given made sense for Lee to call Larry out. Since we as humans understand the full unfairness of racism, it sounds completely acceptable to mention it. This scenario also works because the player gets to experience it from the victim's side, yielding higher accounts of agreement.
In the end, I think Telltale is capable of implementing slavery in their game. The unique and foreign set of circumstances yield additional stress and problems for a victim to solve, not to mention a clear and obvious way of developing characters. It's easy to side with a slave over his slave driver, and this draws the player in to the man's aid. The intense stress from a harsh authority immerses the player even more. What would you do if you knew someone stronger than you was looming over you head?Whether Clementine's experience or from the mind of someone new, indentured servitude certainly adds a horrific new level to The Walking Dead.
(P.S.) I have the forethought that a lot of people will boo and hiss at the thought of such a painful and unjust plan, but you know what? The Walking Dead is exactly that: painful and unjust. Not one person wants to be where they are. Rather, the circumstances are simply thrust upon the poor sap. Like trees in the winter, each survivor must carry on and force themselves to continue the struggle of living, even when surrounded by death.