Dont have. Nowadays we have too much specialists in Singapore.
U see in UK it takes about 9 years to train a specialist.
FY1, FY2, CT1, CT2, ST3, ST4, ST5, ST6, ST7.

Ever since we switched to american residency in 2009 it takes about 5years, max 6 years fresh out of medical schools. On paper this is great, because it is faster to train one. If the population did increase at a rate from 2005 to 2010, american system does prevent shortage of specialist.

However, due to electoral pressure in 2011, the population immigration was kept slow.
This causes fundamental imbalance between specialist growth and patient growth.
ten years on, we have plenty of specialists. Finding jobs for the locals is hard enough.

Due to electoral pressure, govt needs to ensure the local specialists have jobs before hiring additional foreigners which will add to the manpower excess.

To solve this problem of manpower excess, we are switching back to a semi uk system will slow down the throughput of specialist production. Let them do compulsory 1 year hoship before they can apply for residency.

Furthermore it is thought that specialist care can be expensive, and more emphasis is placed on primary care to reduce downstream complications and sequelae, hence the recent drive for primary care.