Think about this. people choose themselves over other, why? Because they are given the option to either benefit themselves or someone else. But if you enabled them to benefits themselves AND others, then of course they would do it. To explain how this would work, you just simply decrease, drastically, the cost of buffs to self and others. if you can give yourself an improved buff and still have enough energy to buff say, 2 more teammates, then you are not forced to choose. Just buff yourself and a teammate.
However, SD wants to make Brink fun for
everyone (hence the lack of OHK snipers, more XP for Medics to heal and revive teammates, and the like). Yes, the goal in this game is selflessness. I fully plan on passing out the best weapon-buffs I can to my teammates at match start, and I suspect Devil will reciprocate with advanced health buffs. I do hope I'm not the only Engineer passing out buffs and Devil isn't the only Medic there adding health. Well-rounded teams are key to success in this game, not simply having two people per class on your team. That's why balancing your Abilities will be so important. I plan on avoiding taking Mine and Turret abilities like the plague, because I know that there will be an infestation of Operatives early on in the game, and my Abilities can be better spent on something they can't compromise/use against me.