the parties themselves. some have fancy mechanisms but some don't. if you don't like it you can leave. generally it's a mix of clout and seniority. they put leaders, celebrities and smart goys on top. i think the reason we have more parties than you is because it's not hard to make a party. our political system is very volatile and there are many distinct interest groups like rural v urban, lower vs upper class, regional, nationalism, education and so on.
Romania