Why were many federal jobs given to supporters of andrew jackson?

In politics and government, a spoils system (also known as a patronage system) is a practice in which a political party, after winning an election, gives government civil service jobs to its supporters, friends, and relatives as a reward for working toward victory, and as an incentive to keep working for the party—as opposed to a merit system, where offices are awarded on the basis of some measure of merit, independent of political activity.

The term was used particularly in politics of the United States, where the federal government operated on a spoils system until the Pendleton Act was passed in 1883 due to a civil service reform movement. Thereafter the spoils system was largely replaced by a nonpartisan merit at the federal level of the United States.

The term was derived from the phrase "to the victor belong the spoils" by New York Senator William L. Marcy,[1][2] referring to the victory of Andrew Jackson in the election of 1828, with the term spoils meaning goods or benefits taken from the loser in a competition, election or military victory.[3]

Similar spoils systems are common in other nations that traditionally have been based on tribal organization or other kinship groups and localism in general.

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classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.