IF you are american born.. your stuck in a system where by even if you work internationally you have to declare it US
even if you want to renounce your citizenship you have to declare everything to the US before you renounce

other countries are different
here in the uk i can go (as a UK citizen) to UAE and work tax free in a different currency and come back to the UK with all that money and not have to declare it
if i wanted to change citizenship i dont have all/as many of the hurdles of tax that the US has when changing citizenship.

however in R.Vers case.. he had a bad tax adviser that made many mistakes over the years. and some either in conjunction with ver or under vers order. some were obvious evasions(rather than avoidance's) but essentially the US tax code is the pittful. its not designed to be clear and straightforward. thats why if you are american you need to actually learn tax law or get a good tax adviser that specialises in other currencies of other jurisdictions

the point of us tax code law being complicated is simple. it creates middlemen. if the tax code was simple. we wouldnt need to hire accountants, tax advisers, etc... we would all be able to simply self file using standard templates