Why did andrew jackson remove many government workers from office after becoming president?

He called it a reforming purge that was designed to help the country. In reality, it was done to make room for his own party because it was the spoil system in which the governmental positions would go to party members, not to those who actually deserve it. During his first term, he changed as much as 20% of government workers.

He did it to add his friends.

An attractive economy.