UKIP home affairs spokeswoman Jane Collins MEP said the EU "Had perpetuated the profits of criminal gangs who exploit the border free travel and non existent checks at the external border."
Her comments come as Europol admit migrant smuggling "has emerged as one of the most profitable and widespread criminal activities for organised crime in the EU."
“The migrant smuggling business is now a large, profitable and sophisticated criminal market, comparable to the European drug markets” said its director, Rob Wainwright.
"The EU is a bonanza for criminal gangs with its policy of letting anyone stay in the EU who claims they are from Syria," Ms Collins said. "They basically told people how to get in the EU and stay here."
"But the lack of internal borders and their obsession with the Schengen area despite it being used by the perpetrators of the Paris and Brussels terrorist attacks, shows they are more interested in their dreams of a United States of Europe than in protecting people from crime.
"Schengen is the free movement of terrorists and AK47s: it is obvious that if you facilitate the movement of legal goods, you facilitate the movement of illegal activities to a greater degree," she said.
The MEP added that "this is firm evidence that a post Brexit Britain must have stronger borders, investment in our border agency not cuts and the political will to kick out foreign criminal gangs even if they did move here before 2016."