those things you say HAPPEN RIGHT NOW.
Making it legal would in fact make those things happen less because it would be regulated like other business. lol
Not AS easy to make it mob run, or have minors or salves when the government is coming in doing inspections for code and health reasons.
also Amsterdam is not the USA I couldn't care less what they are doing over there. If its regulated by code and health (government basically) mob participation, slaves and minor abuse is NOT going to go up. This isnt TV.
Would they still happen in amounts? of course nothing works perfect but here in AMERICA it would be less not more.
To even suggest the regulated prostitution industry would start using slaves and minors at out of control rates here in the US is nonsense and fiction.