People do pretty well universally use their position, and tgheir resources to give their children a leg-up when it comes to getting a job. That applies at all levels and in all fields. Musicians, bricklayers, journalists...

When it comes to politics this applies as well. And alongside this there is a widespread preference on the part of people in all kinds of show business - and politics from one point of view is a matter of show business - to give special attention to the children of previous "stars". At least to start with - if they turnout duds they tend to drop out of sight. The most outstanding counterexample is perhaps Dubya. Democracy doesn't stop that - indeed it can provide a mechanism in which it thrives.

The effect is to give unfair help to some and unfair disadvantage to others. Finding ways of restoring the balance is important, and it gets insufficient attention. Because of course it doesn't suit people who have "made it" and who have children waiting in the wings.