The money printer is self-perpetuating in the short term but self-destructive in the long term.
In the short term, the money printer can be used to incentivize powerful institutions to support it. The military, banks, and academia are some of the institutions that come to mind. Governments can also create programs that make people dependent on the money printer and more likely to defend it in the future. I would guess that there are tens of millions of people in the US that are completely dependent on the money printer through social security and government jobs.
From a long term perspective, every time the money printer is used, the broader public gets hurt through inflation. If money printing is used sparingly, this might go unnoticed. But as greed and corruption seeps through the government, money printing inevitably ensues, and people begin to lose faith in the currency. The power in the money printer disappears as the money it prints becomes worthless.