In 1967, Zulfikar Ali Bhutto formed the socialist Pakistan Peoples Party and attacked Ayub administration's economic, religious, and social policy while taking the nationwide tour. Detention of Bhutto further inflamed the opposition and demonstration sparked in all over the country with East Pakistani Awami League charging Ayub administration of segregating policies towards East. Labour unions called for labour strikes against Ayub Khan's labour legislation and dissatisfaction was widespread in the country from country's middle class by the end of 1968. When the Ayub Khan was presented with the Six points by Sheikh Mujibur Rahman and Bhutto's called for disapproving Ayub; he responded by imprisoning both leaders but that made matters worst for Ayub's administration. Left-wing parties, allied with the conservative mass, began advocating for the Islamic parliamentary democracy system against his presidential rule.