in part low coverage reflects the high incidence of informality and selfemployment while workers in informal employment cannot be affiliated to social security it is not always compulsory for the selfemployed and when it is it tends to be difficult to enforce the share of selfemployed in total employment is around in indonesia and between and in most of the other emerging economies well above the average oecd share of about see annex a in oecd b for details moreover coverage of contributory programmes is concentrated among betteroff workers