Come back when yourr draggins have real holes in em.....
Perhaps you are just too hardcore and you are using them at 10x more than the average rider, and thus wearing holes into them sooner?
Anyway, I suspect it's to do with the body shape the pants were designed for.
Since there's usually only one cut or shape being sold in AU, it's not surprising that if there's a mismatch in body shapes, bits wear out sooner for some than others.
My belt hoops got vibrated through by my belt, as my waist to crotch distance is too big (big ***) when compared to my leg length.