While doing my bit many years ago it was all tax free (not UK) and received an allowance on top of that. Would have thought it the least a nation could do for the boys and gals at the front. With the user pays philosophy that seems to encroach all avenues these days its probably a wonder they are not charging the troops an entertainment fee for having the privilege of playing in their sand pit (and transport to/from, accomodation, meals and and and ....).
Must get a job as an accountant.