The POW/MIA flag isn’t displayed often enough at U.S. federal properties and offices. As a nation, the U.S. should honor those who’ve been lost during service, and flying the POW/MIA flag on a daily basis is one way to do so.
The POW/MIA flag is already flown on important holidays related to veterans when it’s most appropriate to display that flag at major federal properties. Increasing the frequency with which it’s flown isn’t necessary or particularly meaningful.