President Higgins stresses the importance of individuals increasing their awareness of poverty in Ireland and deciding that it is an important issue to address. He emphasizes that humans are interdependent beings and acknowledges the power that social cohesion can have in eradicating issues like poverty. Based on President Higgins's viewpoint, how does social policy manage human interdependencies?

This is a great question! I will define social policy and provide an explanation of how it manages interdependence.
Irish social policy is based upon the idea that government is responsible for the welfare of the general public. In this instance, the foundational principle of social policy is interdependence, which is defined as the mutual reliance between groups of people. President Michael Higgins argues that this social cohesion is crucial to the fight against poverty. From that standpoint, any social policy that is crafted must focus on the management of human interdependencies. Basically, this type of social policy is vested in preventing social fragmentation. 
Such a social policy manages human interdependence through education, a realigning of national taxation policy, and mutual cooperation between economies. For example, President Michael Higgins maintains that the teaching of philosophy is crucial to changing widely accepted worldviews. 
In terms of mutual cooperation between economies, President Higgins supports the economic interdependence between Ireland and Great Britain, an interdependence that promotes intellectual cooperation and shared innovation. Last but not least, social policy is focused upon eradicating economic disparity through a realigning of tax policy. A welfare-based state focuses on raising taxes to pay for social programs that address the housing, food, employment, and health care needs of the economically disadvantaged.