Well the direct answer to the 'argument' you're making is that it's NOT roughly comparable. To address it in any more depth would be giving credibility to the strawman you constructed.
Ahaha Joel CherryTruck Insanikatz strikes again.
Why not have different levels of trust? Like say I have Mt.Gox and Bitstamp on my first tier, and I consider those equal value and provide liquidity for them. And then tier two could be my immediate family/friends I trust. And then lower tiers for other more risky people/gateways such as TradeFortress.
Is the system not compatible with this arrangement?
Also, why not reward the people providing liquidity with XRP as a transfer fee to offset some of the risk?
Because they don't read
Trilema. More importantly, because they can't afford actual consultants and don't have who to give them the quarter to buy a clue with.
In fairness to ripple, MP appears to not totally understand ripple. He seems to be confusing XRP with IOUs/debt on occasion (in the IRC conversation) and also making the mistake many have made of believing if you trust someone and they then trust someone else that causes a problem. It doesn't - at least not one related to ripple specifically, just the general risk that they lose money to someone else and can't pay their debt to you. The big problem comes where you trust two different parties and that trust is then treated by ripple as being identical in value and fungible if it has the same denomination.
Specifically this is incorrect:
"Well… that’s not how Ripple works. As long as you trust both Lou Jiwei and some random Chinese dude
any people who trust you can trade LJ’s yuans straight for the random dude’s."
The emboldened part should read "any people who trust LJ and hold random dude's yuan can exchange random dude's yuan for any of LJ's yuan that YOU hold".
They don't need to trust you at all - or even know you exist. And if they do trust you it wouldn't make any difference - as it isn't YOUR (as in ones issued by you) yuan being traded. They need to hold random dude's yuan (they can have zeroed trust to him) to send you and trust LJ sufficiently to accept whichever of his yuan you hold. Then they can exchange the junk for good stuff with you - limited by the extent to which you trust random guy.
A lot of people arguing about this don't really understand this - so describe a problem which doesn't actually exist, giving ripple an easy way out (by letting them focus on addressing factually incorrect assertions about how ripple works whilst ignoring the real problem).
The general issues pointed out by MP at the start ARE real problems of course - particularly the whole system being based on a requirement that users willingly accept CP risk (I might not get my money back) and opportunity cost (my money isn't earning anything) without remuneration. If the software is amended to fix the specific issue discussed in this thread (which effectively blind-sides people into providing general liquifity when they thought they were holding specific debt) then it's hard to see where liquidity will come from - as providing liquidity at significant risk but with no benefit isn't going to appeal to too many people (not ones who still have significant funds that is - the ones willing to do that should mostly have lost their money by now doing the same stupid thing before).
All of that said, if I can figure out some way to pay interest on Ripple I'd seriously considering offering bonds on it. If there's people willing to provide liquidity for no cost then I'm guessing I wouldn't have to pay a very high rate - making it a cheaper way to fund-raise than I currently use.