How about we look at recent history. How have private secotr people done in recent past with raises in the minimum wage?   In DC the hospitality industry in DC saw a sudden shrink vs growth in surrounding areas. http://www.bls.gov/eag/eag.dc.htm    or who gets hurt the most 
http://fee.org/articles/minimum-wage-hurt-the-young-low-skilled-almost-as-much-as-the-recession/
http://www.investors.com/minimum-wage-chills-hiring-in-dc-chicago-la-san-francisco/