I didn’t see what JG specifically said, but what you outlined here does not sound coherent (or feasible) to anyone (like me) that spent decades working in the US bond markets. 

If the FED introduced a form of YCC (yield curve control) that forced the entire curve to be flat at 2 percent, the only way to achieve this would be to print the 10s of trillions necessary to, effectively, buy up all/most of the available supply. Past AND future. 

This would be very very BAD for the US dollar (read: hyperinflation territory) and very very GOOD for ANY hard asset. Especially Bitcoin and Gold. 

There is exactly ZERO chance anything like this will be attempted NEAR term. However, some (creeping) version of this will become absolutely inevitable LONG term.