Illegal, Prohibition vs Legalization, the Wall, Illegal Drugs and Human Trafficking

The more prohibition in a market, the more profit for the illegal market. 1919-33. Markets are driven by supply and demand, free markets especially, free consumer driven without regulation, regulation is a prohibition. again increases profit for illegal activities. On the border and the wall, the wall would cause scarcity in the market of human trafficking, illegal drugs etc. We need the wall. But again, the risk pay more in those activities.Such as immigration and illegal immigration would drive up prices, inflation and interest rates.