Do employers in your country also require new employees to work for free?
In recent years it's become more and more common, especially in fields in which the reputation is everything, like law, and even in IT. Many IT companies in Israel even invite applicants for recruiting tests which are really free work, so say when a company wants free consultation by experts it invites experts for job interviews where they give them questions about real problems they have in their projects, then the applicants do their best since their job depends on it, the company gives the new solutions to their hired programmers, and send the applicants home, and I even heard of cases where they invite them for a "second technical exam" to go over more problems...
Obligatory: https://www.youtube.com/watch?v=27EukoQrVMU