What is the favorite line repeated by the Ministry of Plenty and what is ironic about this line

The Minister of Plenty's favorite line was 'our new, happy life'.

The phrase 'our new, happy life' recurred several times. It had been a favourite of late with the Ministry of Plenty.

This is ironic because the numbers and the news are always new, but they're also untrue. Even the people at the ministry were confused by the numbers, and yet, just hearing them was a source of satisfaction.