Answer:
underlying social disease of inequality and social segregation
Step-by-step explanation:
Inability of the government etc. : if successfull programs by governments really existed to halt poverty there would be no poverty. Governments themselves are part of the problem.
Failure of the tax code etc. : whether it exists or not, the effect is trivial.
Failure of a capitalist market etc. : food supply points donĀ“t solve the problem; they only mitigate it temporary.
In short, the basic problem is that the powerful elite will always try to maximalize profits and by doing so, making the economic gap wider. Furthermore, governments have less and multinational corporations more power.