WARSAW, (Reuters) – Poland is a faithful member of the European Union and opposes centralization of power. This was the Prime Minister Mateusz Morawiecki stated Monday in a letter addressed to European leaders. It comes amid a growing row about the rule of law.

Brussels is well-aware that Poland’s rightwing government has introduced reforms to undermine judiciary independence. However, their argument escalated in this month’s Polish Constitutional Tribunal ruling that some parts of European treaties were not compatible with the Constitution.

This has sparked talk about a possible “Polexit”, however Morawiecki states that his government does not intend to follow Britain’s lead and take Poland out the EU.

He wrote that he wanted to “reassure you” that Poland was still a member of the European Union in the letter. It was posted on Monday on the government’s website.

Morawiecki cautioned against a “dangerous phenomenon” that could threaten the future of the Union.

“It refers to the gradual transformation and consolidation of the Union into an entity which would cease being an alliance of sovereign, free and equal states and instead become one centrally controlled organism, with institutions that are deprived of democratic control.”

Polish Justice Minister Zbigniew Ziobro called on his government to pursue legal action against Germany for what he described as a politicized system of selecting judges in Europe’s biggest nation.

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Ziobro is the architect of Poland’s judiciary overhaul. Ziobro also leads an arch-conservative junior member in Morawiecki’s government. Ziobro has frequently complained about how unfairly Poland is treated by the EU.

Ziobro said at a press conference that “the EU is founded on the equality between all countries and citizens.”

Ziobro stated that, while German politicians select top judges for court in Germany, judges in Poland are responsible more for selecting them. But critics claim that Poland’s judiciary has been influenced by politicians.

A spokesman for the Polish government and the German government’s press office did not respond to inquiries immediately.

Laurent Pech (professor of European Law at Middlesex University in London), said that references to Germany’s situation were irrelevant.

“References to Germany or other locations should be seen as what they really are. They were made to distract Polish citizens form repeated violations to the Polish Constitution and create an autocratic, one-party system that judges and prosecutors can punish at will.”

The government of Poland claims that its reforms in the judiciary are essential to eliminate the remnants of communist rule.