Here is my answer on Quora:

This would simply be equivalent to a tax cut. At the end of the day, every adult American would find $1,000 more in her pocket.

If the Fed does it directly, this would not be counted as government “debt”.

Some people call this “helicopter money”. It is a form of fiscal policy in disguise.

A tax cut would be a good idea today in the U.S.

Also, here is Joerg Bibow’s letter to the Financial Times on helicopter money.