The Fed has a lot of power in the economy because it has a big impact on the supply and cost of credit, that is, interest rates. It also plays a key role in supervising banks and historically has seemed to take it easy on the banks when it shouldn't have, such as in the lead up to the financial crisis.

Initially, QE contributed to a pretty significant increase in inequality. It raised asset prices, which are owned primarily by the wealthy, while having relatively small if any positive impacts on bank lending, employment, wages or economic growth, so ordinary people haven't had much help. By the third round of QE in 2012-2014, the effects had likely muted quite a bit. There were probably not big impacts on asset prices from QE and the positive effects on employment growth might have strengthened somewhat.

People in America get really angry at the Federal Reserve and at the "money system" in general during economic crises. The Fed draws hostility because of its power, its insulation from democratic accountability, its lack of transparency, and because of its historical and structural connections to finance.

The Fed needs to adopt new tools, on its own and perhaps in cooperation with the other parts of the US government, to improve the economy from the bottom up. This includes increasing facilities for debt forgiveness for under-water mortgages and excessive student loans; increased credit facilities for small businesses and cooperatives; helping to underwrite mechanisms for creating affordable housing in cities; and more restrictive enforcement of financial regulatory rules to help rein in excessive banker risk and pay.

Critics, often for good reason, are concerned that the Fed is wielding its vast powers in the interests of the banks and not in the interests of the people. After the financial crisis, Americans have perceived that the banks have been bailed out, but a significant proportion of the population is still in serious economic trouble.

Bankers themselves govern the Fed to some extent, and then there's the classic revolving door where Fed officials come from and then go back to the financial sector. Fed officials tend to believe that the institution should have a large measure of independence from democratic control, even though in law it is under the ostensible control of Congress.

The Fed has a lot of power in the economy because it has a big impact on the supply and cost of credit, that is, interest rates. It also plays a key role in supervising banks and historically has seemed to take it easy on the banks when it shouldn't have, such as in the lead up to the financial crisis.