Prayut made the remark as he presided over the launch of the Thailand Responsible Network.
He said that if the sector spends more every quarter, this would boost economic growth and people’s confidence.
The government has already sped up state investment in infrastructure projects via a public-private partnership.
Office of the National Economic and Social Development Council secretary-general Thosaporn Sirisumphand said the country’s economic fundamentals remained sound, despite the impacts from trade wars.
The economy had expanded on average 4 per cent per year over the past decade, he added.