Most US banks and credit unions offer a similar service, called an "overdraft line of credit." Overall I think it provides the best experience for the customer,

Most US banks and credit unions offer a similar service, called an "overdraft line of credit." Overall I think it provides the best experience for the customer, but there are a few issues. You have to know about it and apply for it. You need a good enough credit score and/or regular income to qualify. And many of the people who currently lose money to overdraft fees would probably just max out their line of credit (commonly $1,000) and then continue to overdraft while also paying $80/year or whatever in interest.