What are the least democratic pressure groups and why?

Insider groups, such as the Howard League Penal Reform, are less democratic than outsider groups because they concentrate solely on becoming closer with the government and do not have to campaign publicly. This is less democratic as they are not taking direct action to include the people, and could become 'Prisoner groups' where they would have to change or go by the government's rule; this prevents memberships of the pressure groups campaigning for their cause. As a result, these types of pressure groups would be pleasing the government instead, and wouldn't have a huge amount of media coverage because the government may not want the public to know that they are close to that pressure group.

Insider groups are more of a form of representative democracy (which is said to be less democratic), so these groups represent a group of people and their views, but many only campaign for them through their relationship with the government; the people that are part of that pressure group may not be able to campaign themselves. However this is isn't the case for all insider groups as members of the NUT a have striked protested in regards to their wages, working conditions, hours etc.