I am afraid alot do -- its called an internship and it is another import from America

It works like this, companies rely on new recruits working for free (subsidised by parents) to get on the job training in their chosen occupation.

think of it as a white collar apprentiship scheme

on the plus side they usually lead to well paid (50k and above) jobs

it is quite a neat way of keeping the poor out of the top jobs, because they obvioulsy can't work for nothing