I think I would push back on the idea that credit and debit cards represent a deadweight loss to the economy. Operating a cash business has its own expenses - theft risk (employee or otherwise), handling time, and (most importantly) you are limiting your customer base to only cash. There's a lot of reasons lots of small businesses are going card only.
For good or bad, a lot of studies have confirmed that cards have overwhelmingly increased consumer spending.
I think the far stronger case is that the industry has no actual incentive to fix the underlying fraud that they are charging merchants to fight. They have done a lot of work to institutionalize the problematic infrastructure and make it almost impossible for startups or outsiders to fix.
For good or bad, a lot of studies have confirmed that cards have overwhelmingly increased consumer spending.
I think the far stronger case is that the industry has no actual incentive to fix the underlying fraud that they are charging merchants to fight. They have done a lot of work to institutionalize the problematic infrastructure and make it almost impossible for startups or outsiders to fix.