It does not need to be a slippery slope though.

I would expect companies to count plane emissions when their employees go on business trips, but not on holidays.

I would also expect companies to count emissions produced by their employees when they work remotely, which should be a part of the total emissions of their home.

Sure, they may not be able to get an exact number, and it will be lots of estimates, but it does not mean that we should accept some approximate statement such as "We're trying our best"

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.

But it makes no sense to attribute the personal decision of the employee into the carbon footprint. Because paying a high salary does not require that the person take airplane vacations. Some don't. And for those that do, they would have the option to pay to reverse or offset those emissions.

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?

On average though, a reasonable very rough assumption is 0.5 kg CO2 / dollar (from what I read). You could make a complex model, but simply saying money = consumption = CO2 is a straightforward starting point.

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.

Microsoft is using the standard way to reckon GHG emissions in climate science, and accepting an order of magnitude more emissions into the calculation. The EPA has an OK explanation of the system:

https://www.epa.gov/greeningepa/greenhouse-gases-epa

Though I think the MS article is easier to understand. If you think this is not a reasonable or accurate way to measure emissions, there are some great peer reviewed journals you could write to.

Companies can't control their employees and you shouldn't be expecting them too. This is part of the problem. We are finally making headway yet people still complain and find ways to degrade. Just be happy that they kind of care and are trying to better our environment. Maybe instead of roasting them you could use your time wisely and suggest even more ways to reduce carbon foot prints.

Where to draw the line is a legitimate question and without it the claim that any real headway is being made is dubious. Some companies offer bussing services in the Bay for their employees so they don’t have to drive as far. If they remove those busses and their employees have to drive in is the company that much closer to carbon neutral even though now all their employees have to drive in and more carbon is in the atmosphere as a result?