This Hacker News thread discusses an article stating Berkshire Hathaway pays 5% of all US corporate income taxes. Some users see this as positive, highlighting the company's profitability and tax compliance, while others view it as a damning indictment of tax avoidance strategies employed by other large corporations. The discussion delves into what constitutes a "fair share" of taxes and the role of loopholes, with some arguing that legally minimizing tax burdens is not inherently unfair, while others contend that exploiting loopholes creates an uneven playing field. There is debate on whether using tax-advantaged accounts like IRAs constitutes avoiding "fair share". Ultimately, the thread reflects varying perspectives on corporate tax responsibility and the complexities of the US tax system.