Charles III is trying to preserve the monarchy, by allowing his brother to face the legal consequences of at least some of his actions.
Andrew more than deserves it. Perhaps he'll be subject to the law for his alleged sex crimes, too, instead of just for disclosing without permission UK govt trade secrets.
Imagine if that extended to others in the UK elite. Personally, I would start with the City, the kings of global money laundering, rather than, say, corrupt members of the House of Lords.