Again, the business transaction is between the patron and the restaurant owner. The employee’s wages are not the responsibility of the patron. They are the responsibility of the owner.
You’re saying “…just for taking it without paying.” However, I am paying. When the bill comes, it is a full account of what the restaurant charges me. End of story.
Edit: No amount of mental gymnastics will change the fact that the restaurant owner is solely responsible for employee wages. Everything else is social shaming.