I have no knowledge of this specific proposal (for anybody who might wonder) so can't say how potentially real it might be (since all kinds of ideas are proposed all the time for evaluation).
But in general I think this statement of things would be fairly uncontroversial:
When an industry offers a new service as an alternative to an existing service primarily due to the profit of the new service, and then the profit of the new service is dramatically reduced compared to the profit of the old service, the industry is going to try to move customers back to the old service.
Debit cards were not created by banks for altruistic reasons. Congress has now eliminated (or reduced) many of the non-altruistic reasons they existed. So, it may be evil to one's view of things, but banks are then going to prefer people move back to credit cards (or secured credit cards, also not capped).
And having had many interactions with our risk groups I'm sometimes amazed that debit cards were ever allowed to exist in the first place.
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