Some spending is done by the Fed independently. For instance, the no-string bailouts that lead to all those phony executive bonus scandals which people wanted to fix by illegally violating their contracts. This doesn’t add to the debt, but it is gubmint spending and does impoverish us that much further.
Good point, and I stand corrected that Congress is 100% (directly) to blame for the spending. That said, the Fed is a creation of Congress. Congress, being accountability averse, has a practice of creating agencies and other entities that it can point fingers at.