sentences:  Singaporeans have attributed to the government's open-door immigration policy the country's overcrowding and falling reliability of its public transportation system, increasing property prices for housing, suppressed wage level, increased competition for jobs and education, increasing income inequality and other social problems.These issues came under close scrutiny by foreign media in the aftermath of the 2013 Little India riot.Local NGOs have also raised issues of migrant welfare, especially those relating to work injury and living conditions.