Good point. If funds were the factor limiting how many people we hired (with some desired qualification/potential) at 6x economic elevation, then it might be better to hire 3 times the number of people at only 2x elevation.
But were that funds limit a bit fuzzy, and we had the option to pay each of those 3-times-the-people at the $200K we decided was the amount to live comfortably in that place, that'd be another option.
(Not to sound all college-frosh socialist. I just suppose I shouldn't get too comfortable with societal compromises, since, if something doesn't bother me, I'm less likely to try to improve it. I also shouldn't congratulate myself on being bothered, and confuse any comfort from that with having actually made any effort on the problem.)
Even if you had that laudable motivation, I’d argue that if the going rate for drives a golf-cart security is $25K/yr, you do way more good to hire 3 of them at $66K/yr than 1 of them at $200K. Maybe to the point that hiring 1 @ $200K is arguably less ethical than hiring 3 @ $66K.