Phew, this won't apply to me, only for foreign (non-Cayman citizens) making a salary in Cayman Islands.
Bad news for all the skilled labour working in Cayman though.
It will affect the diving community, many dm's / instructors are on work permits while being citizens of the US or UK. Most locals have taken no interest in diving. My opinion based on dive-related personel I talked to.
Ten percent is quite high to start off at.
Taxation in the Cayman Islands should be only on luxury items bought by individuals (not corporations). Tax too much, though, and the "rich retired" will go elsewhere.