Tommo - Exceptionally few TA privates receive over £100k p.a. According to the article, only eight Army reservists of all ranks up to junior officer have been paid that sort of money.
In line with the Army's 1-in-5 deployment routine, that's actually £50k+ for being mobilised for a six-month deployment every two-and-a-half years which works out at £20k+ per year. Remember that they still have their normal civilian mortgages to pay and other regular financial commitments to satisfy, even while wearing a uniform. That's why they are compensated for losing their usual income, whatever it is.
The total capitation rate for a Regular Army private (which includes pension provision, medical and dental cover, food & accommodation subsidy, etc.) over the same two-and-a-half years will exceed that and then some, even though he/she will only deploy on operations for the same six months. Any regulars ranked higher than private will cost even more.
jim30 on ARRSE has one of the best explanations
here. If reservists weren't cheaper than regulars, why do you think the Government regards their expansion as such a good idea?