Presently, there are 7,079,000 (big number) job openings in the U.S. Of these, 6,489,000 are in private industry, and 590,000 employment opportunities are in the public sector. According to the BLS 3,500,000 (another big number), workers quit their jobs in search for something better. For those seeking new employment, the public sector pays approximately 36% more all-in.
https://www.bls.gov/news.release/pdf/jolts.pdf