Not really, whilst you'd lose some in enforcement you'd still need to police for blackmarket knock off product. You'd also create jobs in administrating the sales, production and supply chain etc.
The DEA has a budget of nearly $3BN. I doubt that money would go to the same types of jobs or companies if Bayer and Pfizer and others were licensed to sell Morphine and Amphetamines to the public. Seems like the FDA might get some more work, there'd be a bit larger need for customs inspections. But enforcement would go way down, especially without diversion control.
How much money and weapons are used in protecting bootlegged alcohol these days?
Yep. But that may be understanding the case. If you're part of the anti-drug-war-industrial-complex, the worse thing in the world would be for enforcement to "go way down."
Look at state and local cops, federal prison guards and the BOP, state and local prison guards, federal prosecutors, state and local prosecutors, privately owned prisons operated under contract, government employee unions, state and local police departments receiving billions in tax dollars via "drug war" grants and gear from FedGov, companies manufacturing battering rams for those 4am no-knock SWAT drug raids, etc. Let's not forget the U.S. military and border police.
How much money and weapons are used in protecting bootlegged alcohol these days?