This is not to say that India has no regulations on the books. Lok Sabha members, for example, are expected to declare their assets and liabilities - if not their actual interests. Before joining a debate, an MP is expected to declare all personal or pecuniary interests in the matter at hand. Ministers are forbidden to have any connections with businesses that are related to the work they conduct for the government. The Rajya Sabha maintains a register of members' interests, which includes lists of consultancies and majority shareholdings, but it is far from exhaustive. It is not made public. The primary check on any overlap between business and political interests of an MP is his or her fellow parliamentarians - Lok Sabha members' votes can be "challenged" by another member if a conflict of interest is perceived; the House ethics committee is expected to investigate any declarations of conflict.
The sad truth, however, is these genteel systems have not evolved enough to match the rapidly changing ways in which administrative processes can be subverted. Even in the United States, where a substantial ethics staff examines declared interests of Congress members and federal employees to discover conflicts and require divestiture of officials' holdings, loopholes are regularly discovered - most recently, regarding insider trading. In India, no declarations or challenges have been issued in many years. Meanwhile, the Election Commission is supposed to take up complaints of unethical behaviour by ministers; it has long failed to do so, or even to make the Rajya Sabha's book of interests public - which might have made Mr Jindal and Mr Rao more cautious. The mechanisms exist, but it seems they do so only on paper. If there are loopholes in the current regulatory system, they need to be plugged. Politicians and bureaucrats need to realise public opinion will not sit by while the regulatory system rusts.