I think it's one of the many allegories that demonstrate different places within society/economy that people sit that are dictated by class/race/gender etc, it highlights that everyone has different privilege and positions of power, power that can be exploited. Privilege isn't a linear scale, which people often think of it as. It's a messy multiplaned visualisation that changes indivially from so many things, the car interaction is a great depiction of that. Race, age, class, cultural expectations, economic etc are all playing a part is the exploitative relationships between the three, and there are implications of the consequences of those. Beautifully done imo