I wish we did a 5 year census like Canada does. But even at 10 years, all the libertarians and conservatives whine about how "intrusive" the questions are. Back in 2000 there was press coverage of lots of people saying they weren't going to fill out the long form of the census, which led directly to the American Community Survey. So there wouldn't be much support for it.
Well, of course. It's only one more step from there to implanting tracking beacons into people and following them around with black helicopters.
Technically that would be correct. A sly argument would be that the constitution only mandates that there must be a census every 10 years. It doesn't say that there can't be censuses taken in between that time.