Discounts should be given to buyers of the two Sha Tin Home Ownership Scheme blocks where defective foundations have been discovered even if the problems are fixed, a housing watchdog says. The call comes after the main contractor of the Yuen Chau Kok project proposed $50 million remedial works to save the two residential towers from demolition. A Hong Kong People's Council on Housing Policy spokeswoman said the Housing Authority should set lower prices for the two blocks. 'The authority must bear some responsibility to the buyers,' she said. Derek Zen, vice-chairman of main contractor Zen Pacific, said the firm's consultants concluded that the blocks could be saved by adding extra piles to the foundations. Zen Pacific was awarded the contract for the foundations for the five towers. It did the work on three and subcontracted two - where the foundations are substandard. Work at the site was suspended in January after the scandal broke.