The big overspending government in conspiracy with the Central Bank CAN
Certainly these two are those most capable of directly affecting inflation, but it doesn't mean it's necessarily caused by them.
In the case of the United States, insane spending definitely played a role in driving a surge of inflation. However, it's hard to say to what extent it was a bigger factor than the pandemic-related supply chain shocks.
Trump passed a total of $3T in pandemic stimulus bills, and then Biden another $1.9T. That's basically $5 trillion dollars of spending that would not have occurred otherwise. Inflation surged immediately after - this was not a coincidence. They were literally putting thousand dollar checks into every American's pocket - driving up demand for everything, while at the same time supply was struggling more than ever before due to myriad bottlenecks created by the pandemic.
Shortages of key components, such as chips, drove up the price of everything - from cars to medical equipment.
In any case, what you guys are discussing is an incredibly complicated subject, that economists have debated over for centuries. What is inflation, and what causes it, is not a straightforward thing at all. The modern debate is between a monetarist school (broadly what Novichok argues), and the Keynesian school (which argues that short term fluctuations in demand as well as cost pressures play an important role).
To some extent, you folks are conflating a currency's devaluation, with an increase in the price of goods - but that is not always the case, and this is easily demonstrable. Anyway, let's not make this an academic debate.