Participating in a discussion on the government's policy document in the Parliament, Deuba hit out at the government for "vitiating the environment of consensus" after it recalled the ambassador to India Deep Kumar Upadhyaya, who is also a senior Nepali Congress (NC) leader.
The Oli government has sacked Upadhyaya for allegedly conspiring to topple the coalition government and for visiting western Nepal with Indian ambassador to Nepal Ranjit Rae.
Upadhyaya continues to stay put in his post in New Delhi, and has reportedly denied he colluded with India to topple the Oli dispensation back home.
The former prime minister Deuba said the biggest challenge Nepal faces today was the implementation of the budget.
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"It would be ambitious to say that one would do so without forging consensus, which was unbelievable," Deuba said adding that a "temporary" government bringing highly ambitious programmes was a mockery of the parliamentary system.
Deuba also denounced the government move to hold local body elections "in the present situation."
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The NC president also criticised the government for announcing ambitious plans like producing 10,000 megawatt power in 10 years without a proper homework. The government policy document failed to include any plan of action to expedite hydropower projects while making the announcement.
"It is not proper to talk ambitiously of electricity development without forging agreement on the power transmission line," Deuba said.
He said there was shortage of essential goods in the country, black marketing and corruption thrived even after the the border blockade was lifted and the post-earthquake reconstruction work was in limbo.
"Earthquake victims have not received even blankets in the name of relief, a great injustice has been done to them."
It would be a joke to talk of economic prosperity within five years in a country which has achieved less than 1 per cent of economic growth rate, Deuba said.
The government announced that, through the programmes, the upcoming five years will be theperiod of attaining prosperity and the country will be transformed into a developing country from a least-developed country within a decade.