As much as i like pandoc, i hate how many Haskell dependencies it has on archlinux. And the distro is not to blame here. They do it right. In that sense pandoc might be an excellent tool, but for me it's also a reason to think twice whenever you want to use haskell in production. Because apparently, this is a haskell ecosystem issue.
This is very much an Arch issue. The publicly available debian/fedora pandoc packages are statically linked, and, until two years ago, so was the Arch Linux pandoc package. The change to dynamic linking (and therefore 700+ MB of Haskell-related dependencies) was a deliberate decision made at the time to reduce maintainer burden. A statically linked pandoc is still available on the AUR under the name pandoc-bin.