people who seriously know how to code mission critical X.590 root CA PKI infrastructure are not cheap when you're looking at total benefits/compensation per head.
(That is a comment on how easy LetsEncrypt makes generating certificates, something I very much appreciate).
However creating an world-class organization that provides certificates as easily as LE does... definitely not.
And they also aren't working at letsencrypt.
I know a couple folks at Let's Encrypt in passing and they are at the top of my list of folks I would want writing code for me if I needed to trust it with, if not my life, most stuff up to that point.