As the title says, allow players to get a loan at banks; with a ludicrously high interest rate, negative karma every in game day and a few other unpleasant surprises if the players don't pay their debt.
I'll make alt especially to take those 10k caps buy base and deleteself, great idea.
Then tie the debts to the IP rather than the "account"
no lending to dumb people, nor abusers, nor cheaters! (no offense) Remove banks at all! Make them auction halls!
Then the banks could only lend to people that are lvl 24; the ammount lent could be indexed on barter skill; and the player needs to be in a player faction; this way the faction gets the debt, it requires a base, an alt for which you spent time leveling etc.Also it could make use of the useless gambling skill.
So what harm could loans do ? So far you're only explaining how to pay them back...
But who would take them if we got better ways to get caps without drawbacks?
There's no real point in taking a loan IRL, why would there be one in the game ?