She was responding to a report that the ministry is considering a cut in import tariffs on luxury products, from 30% to around 5%, to help position Thailand as a shopping paradise for both Thais and foreign visitors.
She said Thailand already has very low import duties on products such as cameras and accessories, which means these products sold in Thailand and are already lower priced than in some countries like Hong Kong.
Lavaron Sangsnit, deputy director-general of the Fiscal Policy Office, also said any tariff cut must take into account the affect on local manufacturers who produce similar products.
However, a reduction on import duties on brandname products would help gain recognition as a shopping destination and also encourage more people to shop locally.
Thais are listed among the top five world shoppers for brandname goods. The Chinese are the world's top shoppers based on claims for value added tax refund from Global Blue, which tracks refunds, Mr Lavaron said.
A ministry source said the proposed cuts in import tariffs would cost the government over 100 million baht in direct lost revenue, but there would be a greater return to the country in terms of corporate income tax, employment, and from hotels and restaurants.
The Fiscal Policy Office is studying the likely impact of the proposal on Thai industry, but still has insufficient information from private sector to draw a conclusion, he said.
An alternative was to reduce import duties only on products with no domestic production equivalents, such as brandname perfumes or high-end watches.
The ministry has tried to persuade producers of brandname products to set up production facilities in Thailand, the source said. These companies are currently spreading their production facilities around the world.
The source said the tariff charged on imports of brandname products is not a high portion of the retail cost. The high prices of these products sold in Thailand was due more to the high profit margin collected by distributors.