While loot scarcity is not a problem, his pickyness is.

And honestly, the more I learn about Gale and his backstory, the less I like him, and the less I feel inclined to sacrifice powerful and/or valuable magical items to keep this wannabe-Elminster around.

Thankfully, everyone can use scrolls in this game and if on-demand blasting is required, a fiend pact warlock or sorcerer will do the trick, so it's not like having him (or any wizard) around is mandatory.