Internet Corporations use their Marketplace dominance to strangle and control Small Business. They create rules that defy UK laws, heavily restrict HMRC revenue and therefore Public Services and crush or simply buy out any rising competition to maintain their cartels.
Increasingly they dictate our day to day lives and what we see/do/think. They have too much power over our individual finances and ignore calls for change.
Restricting them to a 10% share of any marketplace will stimulate competition and therefore choice, increase revenue to HMRC and stimulate employment and growth in the UK. (Many of these behemoths employ few people yet rake in National Debt level profits and pay little/or no tax).