Why every people want to work as oversees and why do they like other countries than their countries?

i think they want to work as oversees just to be more satisfied with less effort by only judging people and evaluate their work they forgot that the golden rule that the leader is the most person do effort to lead his team to achieve their goals ............ about working in other countries simply if my country give me what i need i will not think to go to any other countries ....plus every  one is a bussiness man in his field and bussiness = time+money ....so any time plus money is good for him in any county is useful for him