Kroger's most recent reported net profit margin was 1.7% with gross margins (e.g. before company expenses) in the 22% range.
Compare that to the SaaS companies, where many of us collect our paychecks, that can have gross margins in the 60-90% range.
If you want to call companies out for price gouging and excessive profit margins, taking Kroger to task for a 1.7% net margin seems kind of silly. Especially when most of us engineers are collecting paychecks from companies with far, far higher margins than that.