Do you need to pay 20 programmers rather than 10?

Do you have a higher customer turnover rate because they encounter too many bugs and lose trust in the system?

Do you lose out on sales because you can't close the feature gaps with your competitors?

Are you unable to respond to customer support requests in a timely fashion because there are too many, or fixing the problems is really hard?

Code quality can't make a business succeed. But sufficiently bad code can cause a business to fail.

I recall fixing a major problem where we could not collect any direct debits for 6-7 months and we put one of the most high profile UK tech journalist's bank account intro the red - that made the Guardian.

Neither I or the company secretary ever got a thank you for recovering in todays terms several million pounds.