Despite his immense wealth, Ng Teng Fong was known for leading a frugal and unostentatious lifestyle. He reportedly carried his work papers in a plastic bag instead of a briefcase, reflecting his practical approach to life. His fortune, which included controlling at least a quarter of Singapore's housing market, did not lead him to indulge in luxury or extravagance. Instead, he was down to earth and focused on his business and philanthropic endeavors. His reputation for frugality and his commitment to living a life worthy of his calling were well-documented aspects of his personality. For more information, you can refer to sources like the National Library Board and Wikipedia.