The impact of QE on generating more lending by Wall Street to Main Street and in generating more employment and increasing overall investment in the economy is quite modest. QE probably limited the initial collapse of the economy in 2008, and likely had a very small positive impact on economic growth, but its broader impact on jobs and growth in the economy seems not very big.

The Fed cannot reduce inequality on its own; far from it. This requires a concerted effort by the government, broadly speaking, to support a variety of efforts. These include things like raising the federal minimum wage, eliminating unfair restrictions on union organizing, increased fiscal spending on needed infrastructure with a condition that these jobs will be decent paying jobs. Of course, this is just the tip of the iceberg, and far from the question of the role of the Federal Reserve.

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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.

Here's the interesting thing: the fact that QE and lowering interest rates almost to zero has worsened inequality, does not mean that raising interest rates will help reduce inequality.

QE and other aspects of Fed policy increased inequality pretty significantly. This is reinforced if you take into account all the other non-standard measures the Fed used to bail out the banks early on in the [2008] 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.