Niwatthamrong Bunsongphaisan, a PM's Office minister, has insisted an in-depth study is still needed to consider whether Thailand's ambitious plan to host the World Expo 2020 is worth the investment.
"We've said several times the use of taxpayers' money must be reasonable, worthwhile and beneficial to the nation," said Mr Niwatthamrong.
"If the study finds it is, then we should move ahead with the plan. If not, we should not."
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