As seen in numerous pictures of druglord's houses, it is filled with cash. If they can invest that money back in the economy without too much hassle, the US government can increase their GDP by mean the means of the multiplier effect. With this, we have the potential to increase our nation's GDP by over 10%.
After everything is legal, the US government can proceed to tax them greatly, as they do with cigarettes.
Lastly, the US government should use this money and invest it in public schools and healthcare (just not in warfare, we have enough of that).



