Which of the following statements about economic thinkers and their ideas are incorrect?
- Paul A. Samuelson believed that a nation's financial stability is contingent upon effective economic planning and judicious resource management.
- Karl Marx identified 'surplus value' as the portion of a product's value that goes to the laborer.
- Ramesh Chandra Dutt's studies supported the notion that British exploitation benefited India's economy.
- Mahatma Gandhi's economic vision included a strong emphasis on rural-agricultural systems and cottage industries.