The U.N.'s expert on debt and human rights says economic austerity policies are hitting poor people hard in Greece and Spain and undermining social rights in the European Union.

U.N. envoy Juan Pablo Bohoslavsky said Friday that it's not acceptable when people "no longer have the means to buy adequate food, lose access to essential medical services or cannot keep a roof over their head."

He noted a "massive violation of social and economic rights in Greece" exacerbated by austerity measures the debt-stricken country has introduced to satisfy international lenders.

Bohoslavsky called on the EU, where around 121 million people are at risk of poverty, to consider the social and human rights impact of future economic programs and reforms.