In third world countries, it would be understandable since there are not much opportunities.
In first world countries such as U.S., there is no excuse. I don't have much respect for people who
born in america, speak English, in his/her 30 and still doing menial jobs. Seriously, these menial jobs
are for immigrants who English skill are not good. They have much opportunites in america and all
they know is cleaning, retailing etc... they are lazy.
what your opinion?
I think you completely lack an understanding of the circumstances in which many people find themselves.
All manner of things could go wrong in someone's life to force them into that kind of situation. Some of those things might have been their fault, some not so much. But people aren't perfect; we make mistakes. And some of those mistakes are things we can never recover from. There are a lot of people in their 30s who, for whatever reason, lack the requisite skill set to do anything more than menial labor. Maybe they even want to go back and continue or finish their education but can't afford to stop working long enough to do so (not to mention all the costs associated with college). Or maybe they already successfully completed their education but their field of expertise is not an area with a high demand in labor, so they're forced to work lower-paying jobs to keep from starving.
This is a complex topic and you're trying to make a very harsh judgment based on a gross over-simplification. The short of it (if I can even shorten something this complex accurately) is that once you get into a hole (one you dug yourself or one you just fell into), it can be very hard, if not impossible, to get back out of it. Life is harsh and unforgiving, even with how much we've advanced in the past few centuries.
You are so quick to judge, so let me ask you: have you never made mistakes that you've later come to regret? Do you find yourself so perfectly motivated that, were you born into opportune circumstances, you would work single-mindedly toward success every waking moment of your life without ever suffering a single lapse in judgment? Maybe you are such a perfect, infallible person, though I highly doubt it. But even if you were, how would you handle it if, say, your single mother got into a car crash when you were fresh out of high school and lost much of her mobility, for instance? Someone needs to pay for her healthcare and other living expenses, and while employers aren't supposed to discriminate against people with disabilities, they most certainly do. So she's not going to be paying. If you, with your single-minded determination, tried to go to college in this situation, your mother would die. So what do you do? You work a menial labor job, possibly working six days a week on twelve hour shifts, so that you can make enough money to pay for your mother and for you to get by.
That's just one potential pitfall. There are countless. What if someone sues you? What if YOU lose your mobility? What if, what if, what if. And most people aren't as perfect as you. Most people make mistakes, and these mistakes can haunt them for the rest of their lives. So forgive me if I'm a bit more empathetic than you as to the plight of the impoverished. Most people aren't there because they're lazy. After all, most of these jobs aren't exactly a walk in the park to begin with; there are other ways for a lazy person to get by that don't involve taking jobs doing mindless, back-breaking labor for most of their waking life.