The Socialist Party in The Netherlands has previously employed a crowdsourcing website (Dutch-language link) to gather ideas on popular ways to bring down unnecessary health-care costs. Anybody could propose an idea, as well as cast a limited number of votes on other ideas. Among the ideas proposed were to return and use unopened medicine packages to the pharmacy (in particular for expensive prescription medicines) and to reuse mobility scooters. The party was and is in opposition, and I don't know if any of the ideas have been implemented (but the party certainly has relayed a selection of the ideas to parliament). Ironically, the idea of crowdsourcing in politics comes very close to the idea by Mao of take the ideas of the masses (...) and concentrate them, even though the Socialist Party officially discarded maoism in 1975.
I wonder if there are other notable examples of the use of crowdsourcing in politics. Internet enables technologies for crowdsourcing that were not available before. Where and how has this been put in practice in politics, if at all?
Edit: there are probably numerous examples where groups of civilians can propose ideas that legislators then have to respond to: petitions, initiatives, etc. However, I'm looking for something more interactive where specific problems are solved interactively by the crowd, such as in crowdsourcing. Wikipedia quotes Estellés and González (2012):
Crowdsourcing is a type of participative online activity in which an individual, an institution, a non-profit organization, or company proposes to a group of individuals of varying knowledge, heterogeneity, and number, via a flexible open call, the voluntary undertaking of a task. The undertaking of the task, of variable complexity and modularity, and in which the crowd should participate bringing their work, money, knowledge and/or experience, always entails mutual benefit. The user will receive the satisfaction of a given type of need, be it economic, social recognition, self-esteem, or the development of individual skills, while the crowdsourcer will obtain and utilize to their advantage that what the user has brought to the venture, whose form will depend on the type of activity undertaken