If the government really wanted to make a difference, it would properly penalise companies that underinvest in security and lose people's information with little to no impact. It would not ask them to increase the data they are holding about individuals. Holding more data about individuals will make subsequent data losses catastrophic to their everyday lives.
There is a risk that a terrorist cell may use WhatsApp to organise a terrorist attack, but equally there is a risk they will use a family car to carry a car bomb or public transport to get to their target. Are we also going to ban public transport and family cars unless the security services have the ability to monitor everyone who makes use of them?