The reason for this, according to this report, is that everybody is treated equally under the law, and is subject to the same "oppressive" treatment. And I mean everybody. They cited an example from a few years ago from a case where the young adult son of one of the nation's rulers was caught committing some kind of petty/mischief crime (vandalism, maybe).
The guy was subjected to the same punishment that anyone else would have faced.
He was flogged in public.
On national television.
I wish we could flog perps caught spray-painting graffiti over here.