How could the Islamic states allow the development of riba-based banks?

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Check below answers in case you are looking for other related questions:
Is it permissible to spend interest money on pets and other animals?
Should he obey his mother by taking out a riba-based loan?

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Is it permissible for him to buy a computer for his son using interest he has received or keep it in return for waiving debts owed to him?
Ruling on getting back a loan from interest-based money
Is it permissible to spend interest money on pets and other animals?
Should he obey his mother by taking out a riba-based loan?

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