I'm all up for significantly multiplying human cargo requirements and prices of them. Some heavier fighters for sure could carry 2 or 3 but with current system starflea can haul 20. They're not comparable to (propably rather small) boxes of hand-held weapons/food/drugs/etc that fit into Sirian universal unit of "1".
While at it, why not apply the same to military vehicles? They're pressumably at the very least APC.