But the problem is, not all people pay the labourers enough. Not all people let them have their dignity and that's when the word "slavery" arises. And it is wrong, no matter how hard you try to justify it. And it is in your benefit to accpect the bad culture in our society and try to improve on it, rather than justifying them. Because, it is in your hand pay them more(which you can afford) and give them the respect they deserve!