If they are truly random sampling and performing monthly polls, then it is a little suspicious that I have never received a call in my 23 some odd years of work life asking if I am employed or not for BLS information purposes.
Not too fishy for you as an individual. But what about for all of us. My math:
There are 114,000,000 households in the USA.
http://wiki.answers.com/Q/How_many_households_are_in_the_US
60,000 are polled so
114,000,000 / 60,000 = 1900
You have a one in 1,900 chance of being polled in any month.
12 monthly polls a year.
1900 / 12 = 158
You have a 1 in 158 chance of being polled in any given year.
Median Age = 36 years old
https://www.cia.gov/library/publications/the-world-factbook/geos/us.html
So the average person here at FR will have had say 16 years of being an adult in the household that might get polled.
158/16 = ~10
SO, the average person here should have a 1 in 10 chance of having already been polled for the governments employment figures.
I haven’t been. Have YOU?