Only way to bust smuggling and to keep risk/profit ratio is to increase prices for contraband and also increase profit.
Example-make full trans of cardamine worth say 30 mil,selling price say 60mil,profit-30 mil per cargo.
That way there will be no power-smuggling due to a high cost of goods,
risk will be higher,reward will be higher,more smuggling activity,
more lawful activity,more fun for everybody.