The purpose of the spoils system is to give your supporters political positions in various federal offices. To the victor go the spoils means that if you win, you can put all your friends or family members or party members at high positions because you control those positions. It's not a system based on merit which was introduced later, after Jackson's policies.
Working conditions were often diffuclt and hard to do and payed a little amount of money
I believe here are always a certain amount of risk involved in human relations, that is because human behaviour is not a 100% predictable. Even if there are big schemes of human personalities, so many little things can vary.