Not wishing to, in anyway defend Mr Holley, but when you work out the amount of commission he receives from members contributions you have to bear this in mind:
The BASSA subs are in two parts.
The first is the standard Unite subscription of £12 per month
The second is the Branch Fund which is, if believe, £5 per month
The Branch Secretary only gets commission on the £12 per month Unite subs also from this amount BA charges for what is known as 'check off'. this is around 2.5% of subs.
But on 8% of total membership x £12 it is not small change.