So...financial domination is definitely a thing:
https://en.wikipedia.org/wiki/Financial_domination
Personally, I think it's nuts. But then, a LOT (read: the overwhelming majority) of people would think I'm nuts for enjoying enemas and injections.
It is in that perspective that I don't think we should be passing judgement on slavejohn. I personally don't understand this activity - but it seems to bring him happiness. Just like I am happy when Playtime sticks me with a needle.
Let's be real - this is a community of hedonism - we are here to discuss and indulge in fantasies and kinky ideas. sj is here for the same reason. We might not share his kinks exactly, but he has as much right to them as we do ours.
@Slavejohn - that all being said, as others have noted - be careful. There are risks to our kinks, as there are risks to this. It is easy enough to let it overwhelm you.
What happens if, tomorrow, Ms. Lynn decides that she has had enough of being a prodomme, and she'd rather open a zen garden in the South part of Cincinnati (I know very little about zen gardens, and nothing about Cincinnati, but it would seem, from what I know, that Cincinnati (or any place really - I just randomly chose Cincinnati) would benefit from a Zen Garden, and, thus, this could be a worthwhile endeavor), never to contact you again? Would you be able to move on?
What if your wife found out? How would you explain it? How would you move forward?
Again, I'm not telling you not to do this, or that it's illegal (hint - it isn't....at all...for either of them). But you asked for discussion - so here it is. We ask many of the same questions of those who enjoy other kinks - that's what this site is for.
FWIW - I'm glad it makes you happy 😃.