It doesn't matter if they have a significant level of intelligence or desire to better their country. That's the beauty of the system. If you have a large enoug

It doesn't matter if they have a significant level of intelligence or desire to better their country. That's the beauty of the system. If you have a large enough sample and a well-designed deliberative structure, even a group of average, self-interested individuals will be able to perform well. The deliberative structure used is based on research into group decision-making, and is usually some form of system where people split into small discussion groups that engage in structured discussion, then present something to the broader group, then discuss again, then shuffle into different groups and repeat the process. The fact that people are self-interested also doesn't pose a problem, so long as the sample is large enough. You probably want at least 100 for good measure, depending on the population being represented. Because it's a representative random sample (ideally it's not fully random, but weighted to represent population demographics), you get a broad slice of the population and therefore many competing interests. An individual may wish to further their own interests, but this would conflict with the interests of everyone else. Overall, the group's incentive is to do a good job, because they live in society and their decisions will affect them.