That's severely flawed logic to insinuate that hourly wage equates to work output. You must be on salary. Us little guys don't think like that, I promise. Underpaid workers don't want "more work" paid the same amount as if they do "less work," unless they're paid proper living wages in which case they wouldn't feel cutting corners necessary imo.

It's more work for them to lookup the amazon price and fill out whatever price change forms they're required to submit in order to get you the lower price. The alternative is just telling you it's not a match, swiping the barcode over the scanner and handing you a receipt.

They maybe evaluated by some sales metric rather than percentage of hours present during shift hours ;)