I'm sorry but this is complete, total and utter nonsense.
The government is supposed to work by collecting taxes and then spending these taxpayers dollars.
If the government wants to invest in something (like big infrastructure stuff), it's supposed to borrow money (for example by emitting bonds) and then pay that money back (even under keynesianism).
The European Central Bank's mandate specifically says that the ECB's role is to keep inflation in check.
Nowhere is it explained that any government spending can be realized by the government(s) printing money at will.