File photo of Malaysian Prime Minister Mahathir Mohamad giving a speech. (Photo: AFP/TASS Host Photo Agency/Valdimir Smirnov) 

KUALA LUMPUR: The Malaysian government has no reason to reintroduce the Goods and Services Tax (GST) as frequent changes to the tax system will adversely affect the economy and lower investor confidence, said Prime Minister Mahathir Mohamad on Tuesday (Oct 8).