Why should it be the same? If I join a year after you, I sure as hell hope you have more, all else being equal. If we join the same day and you are twice as critical to the success, I hope you have more, because your incentive pulls my outcomes higher.
However, amount of and terms around equity are part of the overall compensation package, and if the principles espoused in the document are relevant to salary, then they should also be relevant to the equity component of compensation as well, no?
For equity, earlier grants are at a riskier time (and where your contributions are more concentrated and influential). Earlier employees should get more (not just have more after 2 years compared to the new joiner, but for their first grant to be vesting more next year than today’s joiner’s first grant).
There’s are things that I personally wouldn’t like about the scheme, but I think it’s quite hard to make a “it’s too unfair” principles-based argument against it.
If not, then the differentiation in compensation just moved to whatever liquidity event.