reality shows, competative games and Show time

I do watch a dinning show that has take place in an European country. They pick 5 people in different cities and each person has 3 hours, they prepare and give menu to production of the show, and during these five days, people do shopping and present their food in front of camera, and welcome their guest in a same way. Honestly it is kind of entertaining when I do knit to watch them because they do argue over table manner, food, and during the show of course some people favor some others, and envy or "hate" others so all these conflicts creates a good rating to TV Channel. Because the competition is too high and each person like to have ten thousand $ at the end they do not give good score to other one; therefore, every night people who gives score to each other is not fair. That's why the channel added one more layer to the show and every Saturday they ask to the audience about who they favor at and that is added to their own scores and someone eventually wins. Due to taking audience's scores people becomes a bit more polite which reduces to problems during the show which is bad but what I do not understand is that why people vote for someone who they don't know at all. Someone gonna get 10 thousand dollars at the end and so what is it with you? You don't have any benefit of it plus you don't even know how the food is tasted. You are not sharing the money with winner either. But people votes crazily. But what I hate most sometimes competitors eat everything on their plates, and ask for more and at the end they say the food was horrible. Come on why did you eat then? Well it was just because I was hungry. Is this type of prisoners dilemma or social ethical deformation?
I know that most of the people likes reality shows it is just we know that it is not a fiction. So we saw people eats weird thinks to get certain amount of money, act weird, become something else. it is worth to watch hah? It is real and unusual, and dangerous and disgusting. But someone like us do that for the reward? Does it distinguish animal side of homosapien? Does it prove that people can do anything for easy money? Does it shows that people are desperate to do whatever it takes for money? How many people try it just for fun or have a different experience? Or are we all the puppets of the rating games?

P.S. related movie: Live
Has anyone see it?