Internship

[Donald Trump]

An [internship] is when (usually a college [undergraduate]) goes and works for a company who can get away with paying him a very small salary or often nothing because he hasnt graduated yet.

Its basically just working to make someone rich and [getting nothing] in return - the modern equivalent of slavery, except nowadays, people are actually willing.

[Renato]

The position of a student or trainee who works in an organization, sometimes without pay, in order to gain work experience or satisfy requirements for a qualification.

[Renato]

a period of training spent in a hospital by a young doctor in order to finish their medical qualification: