In Bombay the slums cause an aging of children beyond their years. There is a market for kidneys, eyes and other organs, which keeps the organ trade going. This is not what people are thinking when going on to alternative trips. Some things that people need are very expensive and the only way out in heavily populated countries is to sell an eye for example. Bureaucracy exists in some nations such that it is very difficult for benefits to reach the common person. Sometimes it takes the power of a separate agency to interfere in government-controlled bureaucracy to make sure that the population has a fresh water supply. These are some of stresses of living in the modern world and there are specific stresses felt by the impoverished and excluded members of society.
If getting clothing to keep warm is an issue in countries where it gets cold during the winter and finding warm clothing and heat are an issue, than it is particularly stressful for people who cannot afford to spend money for what others take for granted. In addition, think of the exposure of the down and out, to street gangs that will purposely pick on the isolated bum that has no means to protect himself against them. I noticed this once at a metro stop where youth congregate on their way to school and made it a sport of molesting a guy who already had his teeth knocked out.
Another sore point of poverty is being sold into slavery with shackles as is done in the Sudan, to pay for family debts or provide man power to an industry that stays secluded despite all the legislation that abolished slavery in 1865. It looks like that happened only on this continent and the slave trade is doing well in Africa and Asia and South America. In certain Asian countries slavery is a commonplace way of paying back debts where people sell themselves into situations that are irreversible, the individual works under slave conditions to buy back his freedom and obtain meager earnings for their families. Is this the price we are paying because we are too many on this planet?