How was britains government also a necessary ingredient

The Government of the United Kingdom, domestically referred to as Her Majesty's Government,[note 1] is the central government of the United Kingdom of Great Britain and Northern Ireland.The government is led by the prime minister (currently Boris Johnson, since 24 July 2019), who selects all the other ministers. The prime minister and their most senior ministers belong to the supreme decision-making committee, known as the Cabinet.

British Parliament

Ministers of the Crown are responsible to the House in which they sit; they make statements in that House and take questions from members of that House.

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john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.