500 British Business Luminaries moan about 50pct tax rate

The arguments of these 500 pillars of the British Economy are laughable but also symptomatic of the feeble state of entrepreneurship that has been a factor for the relative (and absolute?) decline of British Business over the past 40-50 years. Would these businessmen really work less just to spite the government? Their income would decline even more if they would do so. Would they really cut employment or refrain from expanding the business if a good opportunity presents itself? As Warren Buffett argues over and over again, the economy in the US, for example, grew pretty fast in the 1950s and 1960s when top marginal tax rates were much higher.