You seem to be missing the fundamental definition. Capitalism is a system where a class of owners exploits those who must sell their labor. A capitalist is a factory owner or a landlord who profits solely from their ownership, not their work. In a socialist state, a worker’s labor has direct social value. They are building a society for all, not generating passive income for a separate class of owners.
In any stable society, leaders represent the interests of a constituency that backs them and keeps them in power.