That grant would be bigger than anything any subsequent engineer would earn, and it's beyond dubious to think the contribution of this guy -- who's patting himself on the back for figuring out a CRM schema -- is worth more than the guy who stays for 4 years and actually helps brings the product to maturity and exit.
If I've learned anything since I got out of graduate school, it's this: what you're "worth," what you "deserve," are meaningless concepts. You get what you negotiate, no more and no less.
Someone who thinks that 40 beeps for the founding team is too much probably shouldn't invest in this startup. For me, if I thought that the company would be worth $100M in five years, the $1.6M the SW team would be getting would be the least of my concerns, well behind 'how do I get in on this?'