the spoils system made political parties more powerful by ...
because it encouraged political parties in the beginning their was controversy over political parties but with the spoils system it they were being accepted and even encouraged.
The spoils system made political parties more powerful by filling important government positions with party supporters. This is a form of reinforcement since people belonging to the same party have the same goals in mind and the means to achieve them. This makes it powerful as the members dont take much time in convening with the process and affimation procedures.