Does anyone know what happens to the interest rate on credit card debts after going through bankruptcy?

Some of the things I read indicate that a single late payment on ANY credit card can result in ALL the credit cards the consumer uses raising their interest rates to a very high rate (I think I have read 29% but that is ridiculously high)

So a consumer gets into trouble, has a late credit card payment and the next thing they know all of their cards are charging them 20%+ interest – a few months of this and they head to the bankruptcy court

I assume the bankruptcy process modifies the consumer’s debt so the monthly payment is manageable (interest rate and amount of payment)

I hope that the bankruptcy court isn’t sending debtors back into the world with debt charging over 20% interest – if they are, the term ‘debt slave’ is appropriate for these unfortunate consumers – does anyone have insight into the bankruptcy process?