"In a way it makes sense as the wealth producers must be unhindered, tax them too highly and they move to a regime which values them enough to allow them to work efficiently"

Funny that. When the fat cats threaten to move out we declare that they must be unhindered in order to keep them here. Heaven forfend that we tax them much, if at all. When the miners and the shipyard workers and the steel workers threatened to strike to improve their pittance, they were "holding the country to ransom." I think I know who the real wealth creators are and I think I know who's really holding the country to ransom, and I think I know that you've got it arse about face.