In those cases the restuarants generally set at 7 to 8% sales ratio for rent number.10 years from now development costs are higher with inflation which dictates higher rents for new builds.

Exactly what gives you such authority to dictate what any of us are or are not until we bring evidence to your "court" to "prove" our innocence of your accusations? 

This element ultimately dictates the ddesirability of the business and therefor its price.

If you want to maximize cash flow that would dictate where to look, if you want more appreciation potential, that would direct you to other areas, etc.