We don't need to take a census. Go for efficiency and use the records they already have - The IRS collects this information every year on every one of us. They know how much we make, how we make it, how many in every household, our status as citizens or visitors, and our home ownership status.
Questions that the census asks that the IRS does not already have are genders and race, but as I recall those are unconstitutional items to base any decisions off of anyway.
Quit wasting our time and money, and read the public reports that are current every year!