I can't speak for Tories (or other people in the UK), but there may be a difference between government legislators and government executives. Executives have ce

I can't speak for Tories (or other people in the UK), but there may be a difference between government legislators and government executives. Executives have certain obligations, and being an executive in two (potentially conflicting) organizations may be more 'hazardous' or 'conflicting' than being a legislator in the government and an executive in a private capacity. As an example, it seems common for many city councilors to run businesses, but it could be seen as more problematic for a mayor to do so.