This claim is a baseless conspiracy theory and recurring pro-Kremlin disinformation narrative about the coronavirus crisis, attempting to portray democratic countries as failing to handle the pandemic and infringing on civil liberties. See similar cases that the COVID-19 outbreak is a pretext to gain control of the world's population, that COVID-19 is a political move to install hegemony, that the coronavirus is provoking the collapse of open society, and that democracy and freedom prevent Europe from fighting the virus effectively.
New Zealand announced a month-long shutdown on March 25 to combat the spread of the coronavirus, invoking a national level-four alert that means people are instructed to stay home, schools and universities are shut, all non-essential businesses close, and air travel and public transport are only to be used to transport essential workers and freight. Essential services such as supermarkets, doctor's offices and pharmacies will remain open. This approach follows that adopted by many other countries around the world to limit the spread of COVID-19, based on the social distancing recommendations advocated by the World Health Organisation and other health authorities.
New Zealand's Prime Minister Jacinda Ardern has been praised for the clarity and compassion of her handling of New Zealand's response to the coronavirus. The government has set up an official website on COVID-19 that is available here. A detailed overview of the measures and lockdown conditions is available here. Information about COVID-19 from New Zealand's Ministry of Health is available here.