The league introduced the 'green shirt' boundary umpires a few years back to give young lads a pathway to field umpiring. It was jointly funded between the league and the participating clubs. By mid this year it was apparent that only one club was left involved and that the purpose was not being realised, so the program ceased.
Most clubs now roster preceding game players to do boundary on a volunteer basis. Problem arises if you start paying for boundary umpires, either the league provides them at cost (hard enough to provide field umpires), or the clubs pay for them (which comes from their coffers - either gate or bar profit etc.). There is a strong argument that if you start paying boundary umpires, what about the other volunteers - water boys, goal umpires, time keepers, interchange stewards.....
Boundary umpiring is a bloody tough gig. The club I used to be involved in through the SAAFL used to pay the boundary and goal umpires, the time keeper used to get a drink card, water boys and score board attendants used to get a kitchen voucher to get a pie, packet of chips and a drink or something similar.
the other volunteers used to get looked after at the end of season presentations with token gifts.
Which is great if the clubs are prepared to do this. Considering some player payment arrangements, it makes you wonder where the priorities lie.