David Cameron told BBC1's The Andrew Marr Show that the Government's changes to child benefit do not punish traditional families but make the system fairer.
Taking away child benefit from those earning over £60,000, that is only the top 15% of the country.
I'm not saying those people are rich but that this will raise £2 billion a year.
If we don't raise that money from these people, the top 15% in the country then we would have to find it from somewhere else.
More top news
A 16-year-old boy has been arrested on suspicion of terror offences as he prepared to leave the UK.
An man is reported to have wounded at least five people - two seriously - in an attack in the Swiss town of Schaffhausen.
Donald Trump's son-in-law has denied any improper conduct during four contacts with Russians during and after the presidential election.