The main reason

 It was already evening when the plane landed in country C . A row of black luxurious cars were waiting for them on the out side of the airport. John Smith was also famous in the country C ,so he have to hide himself from the paparazzi. It was Jackson's advice that they should have to disguise to enter the country, as Lucas's people may be keeping an eye on the airport. As per Jackson, Lucas was very cautious about every thing .He used to plan everything beforehand. He was careful about everything he do. That is the main reason behind his secret life . He was successful in making fool others, by making perfect planning.