'These guys rarely come to play in Fiji so there's very little revenue there. It's not reciprocated. The Fiji players are only getting pocket money. They're disappointed.
'A £150,000 allowance would have gone a long way because Fiji Rugby are working on a shoestring. They have a limited amount of kit because of things like excess-baggage costs.'
Due to funding shortages, the squad are believed to have used a free training pitch while in camp in Toulouse, where they stayed in Ibis hotel rooms costing less than £50 a night.
RFU CEO Ian Ritchie signed off the deal with his Fijian counterpart, having recently earned a £100,000 bonus after helping generate a £407.1m turnover in 2015-16.
World Rugby pay for Fiji's economy airfare, while the tier-one host union are obliged to pay for the cost of hotels, food and coach travel during their time in England.
Furthermore, the Fijian union are fighting to keep hold of emerging players because of the talent drain sparked by the three-year residency rule.
Fijian youngsters are being poached by foreign scouts, with Ben Ryan, the Olympic Sevens-winning coach, comparing the unregulated market to the 'Wild West'.
Nathan Hughes is the latest Fijian to qualify through residency, with the Lautoka-born No 8 due to make his full England debut on Saturday against his country of birth.
The RFU recently announced record profits of £102.3m. The RFU were unavailable for comment on Monday.