Tourist,
You quote....'The soldiers don't get to discuss alarp before they go on patrol'...which is correct, but only up to a point. Airman don't get to discuss ALARP before they go flying either, those decisions/actions are taken by MOD/IPT, etc.
As to the MODs/Governments/Armys approach to something akin to ALARP for the troops, well they are doing it!! It is the reason why Bulldogs/Mastiffs (spelling?)/improved body armour/reduction in use of Landrovers, etc have all occurred - to reduce the risk to the troops on the ground. In the same way DAS systems on aircraft have been updated/added/improved, Hercs are now getting foam, etc.
But how many of these risk reduction measures for troops on the ground are directly/partly the result of inquests, press comments, statements by relatives, and even, dare I say it, internet forums!!