Hard work with the same nature of job can't bring you to the state that may give you some decent edge over poverty, unlike with proper/higher education where you can explore and can take good opportunities to pick a job that may give you better compensation, though not applied with 3rd world country mostly as there's no way to choose if the availability of job are not competitive enough to earn decently.
I mean even you have good education but the economy can't provide good / high value types of jobs then there's nothing we can do.
Even if one manages to become OKish, maybe find a good job that pays some good amount of salary he will have to cater for his junior brothers and sisters, and sometimes even the whole family, and this will end up becoming a heavy load on him.
Most poverty is from the family themselves, and this will keep affecting the children down to the grandchildren, that's why some say that poverty is passed down to the coming generation.
We witness that most of the time with third world country they are stuck with how their parents/grandparents kind of life and the only options is follow the flow and continue living as it is, we might be able to change this if we will manage to exceed with any limitations that blocking our way, if we are really keen in changing our life and our family's future life then we should find the way.