The main party in power has just adopted a "resolution" against the so called "parallel state" (source in Romanian, could not find an international source) [translated by me]:
The National Committee [...] adopted a resolution which refers to "the parallel and illegitimate state" which tries to gain political control [...]
This not exactly new in Romania, as there several declarations in the past against the "parallel state", "the system" etc. (e.g.)
Also, "the parallel state" is not used as defined by Robert Paxton, but having the meaning "state within a state" (source):
The "parallel state" is a term coined by American historian Robert Paxton to describe a collection of organizations or institutions that are state-like in their organization, management and structure, but they are not officially part of the legitimate state or government. They serve primarily to promote the prevailing political and social ideology of the state.
The parallel state differs from the more commonly used "state within a state" in that they are usually endorsed by the prevailing political elite of a country, while the "state within a state" is a pejorative term to describe state-like institutions that operate without the consent of and even to the detriment to the authority of an established state (such as churches and religious institutions or secret societies with their own laws and court systems).
Also, another example of "parallel state" comes from Turkey:
Turkey's former Prime Minister Recep Tayyip Erdoğan has used the term "parallel state" (or "parallel structure") to describe followers of Fethullah Gülen who occupy senior bureaucratic and judicial positions, which have been accused of attempting to bring down Erdoğan's government.
Question: why would a politician from the political party in power rely on such rhetoric?
I think that people tend to support politicians that seem to have power to change things for the better (more prosperity, less corruption etc.) and this message makes them look exactly the opposite: weak and powerless.