The government charges higher rates for permanent residents and foreigners using the public health services. Some of the charges are higher than the charges by private doctors and hospitals. So, the foreigners have to visit the private doctors.
But the foreigners are working in Singapore and their medical bills are paid by their employers directly or through their company insurance.
What is the final result? Foreign workers are attended by private doctors and citizens have to waste a lot of time at the public clinics. This is ironic! But it is what happens in Singapore. What a short sighted government!