A Ministry of Manpower (MOM) study has revealed that almost one in five Singapore workers are over-qualified for their jobs.But this is voluntary because most of the workers choose roles «that better align with their aspirations, work preferences or life circumstances», the study released on Tuesday (April 14) said.Still, Singapore's over-qualification rate of 19.4 per cent is lower than other high-income economies such as the United States, Finland, the United Kingdom and Switzerland — 21.6 per cent.According to MOM, 1.7 per cent of the resident workforce wanted a better job, meaning they were unable to find jobs that matched their higher qualifications.Singapore has a highly educated workforce, with 64 per cent holding tertiary qualification last year, well above the average of 41.2 per cent across high-income countries.The MOM study also said that workers aged 34 and below made up one-third of those in overqualified jobs.In the last 10 years, the median gross monthly income for full-time employed tertiary graduates rose from $5,800 to $7,605.Starting salaries have also increased over the same period. Read more