It's just simple economics.
Someone has said "What this country really needs is a good depression." Perhaps there's a hint of truth to that.
There is high unemployment in this region of the country and it's getting ruder. I just don't believe a company can expect the front line employees to set the tone, hope they can offer the lowest wages possible, do nothing to retain good employees and thing they'll just luck out eventually and get all good ones. Most problems are poor management. You get crappy employees when you don't spend time on interviewing them or paying attention to what they do to your customers. It all comes from the top. It's poor selection, poor training, poor supervision, poor policies or lack of enforcement. You see that when the bottom line is a quick buck.