This poster is from South Florida? You can find Tahini anywhere, already processed, and ready to go. I've seen it in Publix. They have Wild Oats and Whole Foods there too, and any middle-eastern grocery store of any kind will be the best tahini for cheap. They do exist in South Florida.
"The worker has the right to leave his boss, but can she do it? And if she does quit him, is it in order to lead a free life; where she will have no master but herself? No, she leaves to sell herself to another employer. She's driven by the same hunger. Thus the worker's liberty is only a theoretical freedom, lacking any means of realization; an utter falsehood."