The Singapore Government and the NTUC have tried a range of programs to increase lagging productivity and boost the labour force participation rates of women and older workers. However, labour shortages persist in the service sector and in many low-skilled positions in the construction and electronics industries. Foreign workers help make up this shortfall. In 2000, there were about 600,000 foreign workers in Singapore, constituting 27% of the total work force. As a result, wages are relatively suppressed or do not rise for all workers. To have some controls, the government imposes a foreign worker levy payable by employers for low end workers like domestic help and construction workers. In 2012, the Ministry of Trade and Industry (MTI) reported that Singapore should continue to fine-tune the calibration of its inflow of foreigners as the country continues to face an ageing population and a shrinking workforce. Singapore Parliament accepted the recommendations by its Economic Strategies Committee (ESC) for the optimal ratio of the level of immigration and foreign manpower for both high and low skilled workers. The Government recognises that the current overall foreign workforce should complement the local resident workforce and not replace the Singaporean Core concept, and helps companies greatly as they raise productivity through business restructuring and workforce retraining; raise resident labour force participation rate.