It is to remunerate political supporters with open office. The Spoil System is a training in which a political gathering, subsequent to winning a race, gives government common administration employments to its supporters, companions and relatives as a reward for moving in the direction of triumph, and as a motivation to continue working for the gathering—rather than a legitimacy framework, where workplaces are granted on the premise of some measure of legitimacy, autonomous of political action.
It is because of the USSR and them taking over lots of country's and for example the Vietnam war and the Korean war. In both wars the communist's parties were supplied by the USSR. Another thing is that both country's kept on feeling threatened by each other.
The task that volunteer usually do for a political campaign is to print posters and campaign materials. Volunteers contribute to political campaign because they want to contribute to the society and also see it as fun.