But they should increase man power and technology then doesn't matter how is the expense. Life of human being is the priceless. Assume that a poor man only want few extra cash by smuggling cows because he has no other way to earn some extra cash.
What will be the fate of his family is he shoot to dead? Not only his life is ended, but a full family will suffer. And where hunger is predominant, morality will is a loser fighter. So how will the family survive? They will commit more crime for their hunger and border security will have to invest more to take care of them . So isn't problem increasing?