That's not how math works.
2024
Revenue was $147B
Profit was $3.8B or 2.8%
The lowest estimate I found of sales volume through self checkout is 38%.
So a 10% self checkout discount is 3.8% hit to revenue. When profits are only 2.8% they'll take a 1% loss.
The CEO pay being only 0.4% of that $3.8B profit. Isn't remotely enough to matter.
This won't lower prices.