There are SOME free market ideologues who believe that unrestrained corporations will enrich the poor, however I believe they are in the minority. You may be one of them.
The majority of libertarians believe that individual property rights are sacrosanct and that it is wrong to forcibly redistribute wealth to prevent poverty, hunger, suffering. This is the argument of the Tea Party to my knowledge. Am I wrong?
Right now the excess wealth is in the hands of the rich, especially the top one-tenth-of-one-percent (0.1%). Society is presented with a choice: (a) we can take it from them and redistribute it to the bottom 80%, or (b) we can let them keep it and allow people to suffer.
(a) is a moral statement, that the poverty of the poor trumps the property rights of the rich.
(b) is a moral statement, that the property rights of the rich trump the poverty of the poor.
Almost all proposed actions in this situation amount to either (a) or (b). The wealth of society can increase over time, but at any single point in time it is a fixed quantity whose distribution is intimately related to whether poor people exist or not.