Finance Bill

I understand the arguments that the Financial Secretary and the hon. Member for Fareham (Mr. Hoban) are making, but is the point not that promoters are already finding schemes that work, and that the Government, the House and the Revenue are having to find and fix retrospectively, rather than saying in advance, "Yes, this may well work, but we're going to outlaw it, and perhaps it would be better if you didn't promote it in the first place"?