I'm assuming your in the UK, in which case you have just about every opportunity you could ever wish afforded.
There is nothing stopping people earning obscene amounts of money, all you need is the drive and the ability to do something which few others can/are willing/have thought of.
Targeting those who do that sort of thing, singling them out isn't likely to be conducive to a long term plan.Oh and more than just paying yourself via dividends!
People are doing dodgy offshore loan things, to been non-dom. Some people tell me they pay as much as 8%......
Myself I think thats not fair, but as I get older, and realise that the NHS can't treat me properly for pretty much anything (they've scarred me for life.....) that most of the state provisioned services can't be used, I'm all too often left thinking I'm a mug for not doing as plenty of people I know do, and have a better 'accountant'.