A study by E61 found that more than 20% of Australian workers are working under a non-compete clause — and that's everything from senior executives to hairdressers to fast food workers.

The Assistant Treasurer, Andrew Leigh, has put non-compete clauses on the national agenda in Australia, and the Free Trade Commission has recently banned them in the US.

Charles Power and Angela Knox discuss why they have become so common and what happens if they go away.