My folks made me do it the other day, meaning that 'they' can keep up their quite frankly obsessive information collecting about me and you with the ultimate aim of probably squeezing even MORE money out of us.
No, p**s off your nosey f***ers.
The money they squeeze out of you is spent for you on things for you.
The level of funding your area gets from central gov is based on the census, so if you duck out then you deny them (and you) some funds.
Everything else they spend the money on relates directly to people.
Do you want a school place set aside for your kids? If you have kids then you do, if you do not have kids then you dont want the money wasted on providing a school place. Same with fire service, health, housing need, water and everything else.
Surely you do not want them to wase money and to use what they have most efficiently then you would give them a good idea of the need/demand for each service by giving the information.
Have you ever been to Eastbourne? Full of old people. Hardly any kids. Is the place full of empty classrooms? No! with the right information they gear the service to the need of the local population. The census told Eastbourne it had x number of old people and x number of kids, which probably is miles off the national average. So Eatbourne spends more on health and less on education to fit the need.
If they have no information then they spend needlessly on a guesstimate of need and end up spending your money on a wasted class place instead of grannys new hip.