Oh man... I'd love to pay karma to have people do programming jobs for me. Hell, if anyone wants to do a decent size but not particularly challenging job, I'll give you my account permanently.
Also, I think you're fine to just submit a cash job as a normal story.
I'm ready to sell my account on ebay and donate the proceeds to charity. Apparently karma is very important to some people. I have realized it is just a measure of how much I post here.
I'm very curious what the karma->cash conversion rate is. The only reason I haven't put the auction up yet is I feel the rms username is damaged because of my disenfranchisement. If 30 days from the original incident pg won't restore my voting rights, I'll ebay my account anyways.
I can't comment on the HN part of your comment, but I like the way you think, rms. People who design interactive web experiences do so under a lot of assumptions. Seems like you are always asking about the edge cases where the assumptions fall flat. What if I want to game the system to get as much karma as possible? What if I want to sell my karma -- it was my time I spent on the site, why shouldn't I own that effort I put in. Would it be any different than sitting side-by-side with another user and telling them how to work the site?
I have a feeling it ticks people off, but I like the questions. I think awesome business opportunities are built around folks who ask the same kind of askew questions that others don't consider. It's the lackeys following the main path of least resistance that have a harder time.
I think the present limitation has more to do with the fact that karma is dolled out anonymously, which means there's no way to back up the legitimacy of your earnings from the status of your upvoters. It doesn't matter if karma is infinite, because there are a finite number of socially approved participants. This is why national currencies have value in the first place: because valuable organizations/individuals use them to transfer wealth. Money is just a communications medium, after all. One stuck in a pre-web mentality. Existing web currency manipulation systems are as primitive as a YouTube that only played TV in your web browser.
If you make karma transferable and allow negative values (thus creating debt and preventing runaway inflation), you could offer a genuine relativistic currency, in that individuals could back up the worth of their unit independently, without relying on trust in someone else (e.g. the state apparatus).
you don't fix the exchange rate, you let the market determine it. As the amount of karma increases it's possible for a value to decrease. But given how the dollar is doing, who knows what would happen.
here's a game theoretic explanation of why that's no good: okay, fine, let's have an exchange rate where karma gets less valuable as the amount of total karma increases.
then me and my friend will upmod each other 1 karma, because we're each gaining 1 whole karma, but the devaluation we're causing is only losing us a fraction of a karma. With these incentives, everyone will upmod ... and the value of a karma point will tend towards zero.
Also, I think you're fine to just submit a cash job as a normal story.