The biggest issue is the people that claim Thai tax residency at home and home residency in Thailand and don't pay taxes to anyone. I can't do that but plenty of people do it. It could get expensive if you are a tax cheat.
All of this tax stuff is off topic though. The DTV needs rethinking so it is not competing with the O visa or the Elite. It will also be used as an excuse for working without a B and work permit.