Apparently in this case the wife had the higher credit score, though.
If I had to guess I’d assume that she has a lower income or higher debt, despite having the higher credit limit?
I did see where the guy pulled his and his wife’s credit scores, but unless he got the TransUnion FICO 9 version, which is the scoring model Goldman is using, they wouldn’t be particularly meaningful, and should be disregarded.
As you mention, there are other important factors in determining initial credit limits besides credit score, particularly stated income and debt to (stated) income ratio.
Also, even if two people have the same income and exactly the same credit score—i.e. same degree of creditworthiness/risk of default—there can be a huge difference in the credit line an automated underwriting system may offer.
Some other factors which might be considered by the automated decisioning algorithm include: size of existing limits (sometimes a lender will match your highest limit); whether existing revolving credit accounts are individual or authorized user; and any other info that may or may not already be reflected in the FICO score, such as recents lates, number of cards with balances, presence of a public record (judgment, lien, bankruptcy, etc.) and presence of a collection account.
I‘m pretty sure that being new to the game, Goldman is using a canned decisioning package such as FICO’s Capstone Decision Management system. No need to re-invent the wheel.
P.S. Also thrown into the mix: there has been an ongoing glitch (since the invite period) where Goldman has been incorrectly assigning a default $1,000 credit limit to some applicants, and in some cases interest rates were set higher than they should have been. I’ve heard anecdotal reports of cardholders being contacted by GS and had their credit limits drastically increased and their interest rates dropped to the lowest tier.