That link has lots of argument against Graeber’s particular models and methodology, but doesn’t actually seem to argue that much against bullshit jobs as a concept. Indeed, it explicitly endorses to some extent the sort of model used in this post in various places (like e.g. explicitly calling out corporate empire-building as a thing which actually happens). For instance, this example:
The fake job in question is basically a contribution to that glamour: a receptionist who doesn’t have much work to do. But this could end up being a money-saving proposition if the company is able to attract workers, and pay them less, by treating the presence of an assistant as a perk.
That link has lots of argument against Graeber’s particular models and methodology, but doesn’t actually seem to argue that much against bullshit jobs as a concept. Indeed, it explicitly endorses to some extent the sort of model used in this post in various places (like e.g. explicitly calling out corporate empire-building as a thing which actually happens). For instance, this example: