If they didn't receive those high salaries they wouldn't be able to take those personal trips. The more employees the higher the multiplier. So what are we exactly offsetting.
Should the company also reduce their carbon footprint calculations since paying employees more will make then more likely to own a tesla or other electric?
A given employee might or might not fly or whatever. But statistically, the average is going to be pretty predictable, and it's not intellectually honest to pretend that because one doesn't know individual behavior, the average could be anything.