I don’t have time to read this now, plus I’m a bit drunk. But I can already tell you your friend is a man after my own heart. Taking Husserl / phenomonolgy seriously ought to be a top priority for Austrian Econ enthusiasts
I just wrote this half drunken rambling post, which may be similar n scope to your friends paper:
https://forum.freecapitalists.org/t/egoistic-dialectics-contra-argumentation-ethics/23098
Either way, I’m excited to read this just via the title, as I think it is a long overdue subject. Does he use the Austrian sociologist Alfred Schutz at all? If not, that is another man who needs more attention as he was a quasi “austrian school” sociologist and a phenomenologist