Comment by jonbarker

US GDP is just a bunch of revenue. It's also near impossible to understand the accuracy of the number because of differences in applying revenue recognition principles like cash vs accrual accounting. Also, if US business became zero margin (a thought experiment for the sake of argument), making companies pay a percentage of US GDP would create a less competitive US economy globally. A better idea would be a "US Free Cash Flow" figure, which if we could arrive at such a number accurately, would allow for such a setup, which would be cool.