Proposed Kroger-Albertsons Merger Would Create a Grocery Giant
prospect.org
prospect.org
FWIW, I live in Seattle, one of the few areas of the US where your comment applies (Kroger and Albertsons nearby, but not Walmart). I could probably get to 20 of these companies' stores (QFC, Fred Meyer, Safeway, Albertsons) faster than the nearest Walmart. The merger doesn't faze me because we also have Costco, Amazon Fresh, Trader Joe's, PCC, Met Market, and a smattering of independent grocers and co-ops.
If the status quo is sustainable, which it seems like it is, then there is little reason to not consider these mergers monopolistic and stop them.