Startup Idea : Cut Unemployment of techincal being social

Well before starting up i would like to add some background of my self. So i am Abdullah Tariq from Pakistan which is developing country. Here in Pakistan the unemployment is raising day by day and watching alot of people on streets and on road side waiting for small job or work. The idea is simple to solve this issue using social media like facebook and twitter the idea behind is that when a Person hire any techincal person like plumber, electrician , or a person who clean sewage and if the technical person did a good job then the customer can review about him and rate him and share with the others, in the same as ODESK is working.I hope any one got my idea Hope Fully waiting for Positive ResponseRegards