The candidates for Citizens’ Assemblies will be randomly selected from an electoral roll and could only refuse the service on very important grounds. They will be paid for their service. They may have to meet certain criteria, such as age, e.g. the same as for the elections to a parliament, or a minimum level of education. There could also be more complex criteria for selecting candidates, but perhaps more beneficial for the society. This might include selecting randomly, say 30% of the candidates with no initial pre-screening for education, another 40% with a minimum secondary education, the next 20% might include university graduates, and the final 10% might consist of technology specialists, scientists, lawyers, voluntary sector etc. See more here.