Should more pay be given to Commanders & First Sergeants?

Yes they should (and in the AF do), but it should be quite a bit more. Having done fill in shirt duty, I had to attend the qtrly awards breakfast and ALS graduation. Just these two events take up a big chunk of of the $150 a month that is provided. Tack on the "landing fees" or annual dues for Top 3 membership, First Sgt Council membership, the typical "pass the hat" etc. that that "extra pay" is quickly in to the negative.

Don't know about Commanders .. but 1SGs definitely don't get paid enough!

Air Force Commanders also get more pay. It is a small amount, intended to cover costs of unit events, challenge coins, buying tickets for young enlisted troops to attend events they may not be able to afford, & etc. As a commander, I made sure to use my allowance for these "commander costs", and not for myself.