Because self-employment is hard enough without worrying about whether the Inland Revenue is going to come crashing through the door like a former East European police force…
Stop wasting money on investigations into people who are self-employed. This activity costs more money than any recovered and puts many people, often those who are trying to start a new business following loss of "permanent" employment, through unreasonable stress and further expense. Want to boost manufacturing, innovation and get the country working again? Scrap IR35 procedures.