Labor unions - closed shops made it easy. Now it is much harder. Trade associations must market the services they offer. Citizens groups try to attract members based on ideological appeals. Maintenance Use direct mail to solicit.
Lists come from brokers.
On the basis of some known characteristic about the individuals on the list, they are chose as good bets for direct mail. Implications of the Need for Money Economic interests can succeed while citizens groups have a much harder time. Unless groups are able to find the money to support themselves, they will be at a disadvantage to those other groups that have resources. Implications for the poor Some people are disadvantaged in the interest group system because they lave little money. For the poor, even a small contribution is unaffordable.