That's just an overly broad definition. You can call anything anything if you like, but it's not helpful. Slavery is buying and selling humans. You're describi

That's just an overly broad definition. You can call anything anything if you like, but it's not helpful. Slavery is buying and selling humans. You're describing instead a world in which everything isn't available for free, and so you have to make choices on how the resources you receive are deployed. And sorry - I couldn't make out what the game was from your text. I don't think it particularly helps either way. It's easy to construct a game that misses an important component of reality.