Are there any models that can prove/disprove these ideas? Like - take today's situation, plugin all the numbers starting from income taxes to welfare etc and si

Are there any models that can prove/disprove these ideas? Like - take today's situation, plugin all the numbers starting from income taxes to welfare etc and simulate it and see? It would be very interesting to see that. Also, these kinds of ideas should be tested on a smaller scale - may be a town of 25,000 people? That would be really interesting.