The letter written by leading economists to Prime Minister Rishi Sunak warns against giving in to pressure from Big Tech companies to weaken the Digital Markets, Competition and Consumers Bill. The economists argue that changing the appeals system within the bill would make the regulator ineffective and allow tech giants to escape regulation. They emphasize the importance of a strong regulator that can address competition problems in digital markets and work collaboratively with all stakeholders. The economists believe that succumbing to the lobbying efforts of Big Tech platforms would harm the UK’s success as a center for tech investment and innovation.