For - “However” [Maurer]. The “for” means (in contrast to the insatiability of the miser), For what else is the advantage which the wise man hath above the fool?”
What - advantage, that is, superiority, above him who knows not how to walk uprightly
hath the poor who knoweth to walk before the living? - that is, to use and enjoy life aright (Ecc 5:18, Ecc 5:19), a cheerful, thankful, godly “walk” (Psa 116:9).