Nationalist Party leader Adrian Delia said on Wednesday that the PN is working on a long-term plan for sustainable economic development to counter the government's economic model.
What the government is doing, he said in Mellieha, has undermined living standards and public health simply because it is based solely on economic growth via increase in population.
Delia said there has been a population surge of 76,127 people in six years, when Malta was already among the most densely populated countries in Europe.
The rapid population growth had brought about traffic congestion, air pollution, increased problems of waste disposal, pressures on the health system and the infrastructure, a lack of open spaces, high rents and downward pressure on wages.
The government has no vision and its plans are for the short term, whereas the PN would plan longer term and ensure that everyone benefited from economic growth.
According to Eurostat data, Malta's population grew by 18.2% in six years, A Eurobarometer survey had also confirmed the concerns of the Maltese people about issues such as the rising prices of property.
The government's policies were leading to worker exploitation and cheap labour, making it increasingly difficult for many people to make ends meet.
In its economic plan the PN would aim for sustainability, fair distribution of wealth and good salaries while putting the environment high on its agenda and ensuring that everyone's dignity was respected, he said.