MPs should be required to disclose any amount of shares in energy companies. These investments could be accruing personal profit as a result of public policy.
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If the government's policy concerning the energy hikes results in personal profits from shareholdings, then this would be a direct conflict of interest. Furthermore, any deliberate apathy regarding the price increases and directly profiteering as a by-product would be akin to rigging the system. At the moment, MPs only have to declare holdings which are more than 15% of the share capital or partnership or shares which are valued at more than £70,000.