Brazil’s new neoliberal government is set to push through the most socially retrogressive austerity package in the world, a United Nations official warned on Friday, calling the proposed 20-year freeze on social spending a “radical measure, lacking in all nuance and compassion.”

Under President Michel Temer, who seized power after a coup ousted the democratically elected Dilma Rousseff, Brazil’s first female president, the spending freeze would be locked into the country’s constitution.

The senate will hold a final vote on the measure Tuesday.

In response to the news, Philip Alston, the U.N. special rapporteur on extreme poverty and human rights, decried the bill known as PEC55.

“This is a radical measure, lacking in all nuance and compassion,” he said in a statement, calling the package an attack on the poor. “It is completely inappropriate to freeze only social expenditure and to tie the hands of all future governments for another two decades. If this amendment is adopted it will place Brazil in a socially retrogressive category all of its own.”

Many feared that Temer’s rightwing policies would revert Brazil back to a state of extreme inequality. In September, Venezuelan President Nicolas Maduro said the coup against Rousseff was not “just against Dilma. It is against Latin America and the Caribbean. It is against us. This is an attack against the popular, progressive, leftist movement.”