Low level wages are not "slave wages". The phrase "slave wages" is an oxymoron. Slaves do not earn wages: by definition.
The P/E ratio of 23:1 speaks for itself. The Costco high-wage bubble is not sustainable.
Thomas Jefferson paid wages to his slaves. Slavery is a reference to freedom, not wages.
No it doesn't. It means nothing without looking at other information such as future growth rate.
WMT P/E is 20, Costco P/E is 22, not a whole lot of difference, and if one clocks this link, despite the fact WMT has been very firm on wages and benifits to the point they have taken very massive PR hits, their share price has gone down 20%, while Costco has gone up 25%.
http://www.google.com/search?oi=stock&q=stocks:WMT&prev=/search%3Fq%3Dwmt%26hl%3Den%26lr%3D