There are a lot of factors that many people probably don't know or realize when it comes to marijuana.
I would have to say yes ASSUMING that it would help out America's current economical status.
But it wouldn't. If the united states was to legalize it and tax it at similar rates to tobacco and alcohol it is projected to bring in about 6.2 billion. Which is a ton of money, but when compared to how much is already being brought in, (2.1 trillion) 6.2 billion isn't a lot of money. (E.x. 2,106.2 vs 2,100 in billions of dollars) and it is even less when compared to the national debt, (14.4 trillion dollars)