Originally Posted by
Cinco
Yes. Both bonus gold loot percentage and luck / re-roll will have an effect.
The bank vaults and SAXS will give standard gold loot and bags of gold.
Bonus Gold Loot percentage will increase the amount of standard gold loot you receive when opening a vault or killing SAXS.
Luck / Loot re-roll chance can increase the amount of gold you get from the bags since higher rarity bags have more gold in them.
SAXS also has a chance to drop a few items (including a new Relic called Orus' Gold Centipede) - which, as always, are affected by luck.