One of the risks that illegal migrants face when they illegally cross the border is that they risk being apprehended by the country they are migrating to. The border law enforcement agencies of the country they are migrating to will arrest the immigrants and probably depot them.
If the illegal immigrants are apprehended and/or deported, it will cost them time which could have been used to earn wages and salary. This time could have been used to work legally in their home country and in so doing could have earned them money; this comes out clearly if they are ...