GUANGZHOU - Slow income increases has become the most pressing concern for Guangdong residents, a recent report by the local government's think tank revealed.

The Guangdong Situation Research Center released the "Social Mercury" report last week after polling 4,868 families in eight cities around the province during the second quarter this year.

According to the survey, slow income increases, expensive medical costs, a huge income gap between the rich and poor, corruption and high housing prices are the biggest social problems for the residents.