A complete model? I don't have any. I have bits and pieces of things. And so do you. So does your neighbor, so does the CEO of Microsoft, so does the government worker in his office, so does the guy sleeping in the street. Get people together. Have them talk and debate.
Making a new model is the work of a society. Not one person. I do not believe communism is the solution, I do not believe capitalism or neoliberalism are the solution.