Today I write about an attempt to impose price controls on debit cards–an effort that has the support of far too many Republicans. I remark, in passing, that it seems to me that these days more stores are taking debit cards and fewer are taking checks–which suggests that the costs that debit cards entail for merchants are not onerous compared to the alternatives. Now I see my hunch was right: News accounts (this one, for example) suggest that several supermarket chains are either no longer accepting checks or are considering adopting that policy.