I've applied to Netflix many times for many different positions and have never once gotten a response. I assume they are inundated with thousands of applications for every position.
I assume many employers are flooded with candidates too, but that does not explain the salaries. If the supply of candidates exceeds the demand, you'd expect the price (the salaries) to be lower. I don't know what to make of it, but applying to jobs in general just seems to be getting harder and harder as the years pass.
There’s a correlation to quantity of applicants and pay. You can lower pay in high demand jobs but you’re lowering your funnel for the best applications buried in the bunch. This doesn’t matter for a cashier job since you aren’t looking for world class cashiers to disrupt your industry.