For comparison, the Gross World Product is about $90 Trillion, so a global sales tax of about 3% would cover the lower figure. Another way to look at it is tha

For comparison, the Gross World Product is about $90 Trillion, so a global sales tax of about 3% would cover the lower figure. Another way to look at it is that the GWP has an average growth rate of over 3%, so economic growth could continue even if the $3 Trillion spent per year was considered economically unproductive. https://en.wikipedia.org/wiki/Gross_world_product https://en.wikipedia.org/wiki/Gross_world_product