There was a lot of corruption on the part of briefcase companies
Do you think the government officials didn't participate in this horrible mafia?
In Colombia there is a law that allows its citizens to sell their local currency at a different price established in official exchange houses
Of course, like any normal country except the banana republic of Venezuela (thanks to the chavistas)
it will increase because people and government can't do anything
Wrong, of course the government can do something about it, they are just unwilling to do so, they are more focused on stealing the oil money and looting every other resource they can find.