Cameron's comments follow the release of the 'Breakdown Britain' report, produced by the Conservative Party's Social Justice Policy Group.
In the major 'Faith & Nation' report, the Evangelical Alliance, which represents more than 1 million evangelicals throughout the UK, has called on the government to promote laws, policies, and financial incentives that strengthen marriage and family life as foundational for civil society.
The reports aims were two-fold, and urged evangelicals to:
a) Commend and support the divine ordinance of marriage as exclusively between one man and one woman, and promote it, together with the family, as central to the well-being of society.
b) Call on the government to promote laws and policies and financial incentives that strengthen marriage and family life as foundational for civil society.
Dan Boucher, Director of Parliamentary Affairs for CARE, said: "CARE warmly welcomes the Breakdown Britain report. Whilst it is true that family breakdown is the result of a myriad of factors and that cannot simply be reversed by the passage of a new Act of Parliament, there is a great deal that the government could do to strengthen family life in Britain.
"At the very least it should remove the fiscal disincentives for couples with children to live together currently meted out by the tax credits and wider benefits system.
"Better still it should create fiscal incentives supporting marriage. None of this would prevent alternative family arrangements but it would make it plain that the government was committed to giving particular support to the family structure associated with the best child development outcomes."
Boucher concluded: "Any government committed to children's rights and child development should not fight shy of these eminently sensible policy adjustments."