They survey businesses because the Social Security database has too much lag and does not contain enough detail.
The lag is because it is based on employer submissions that are quarterly or annual.
The lag is because it is based on employer submissions that are quarterly or annual.
It isn't until the employer files their quarterly Form 941 that you'd see employment numbers. Form 941 includes the number of employees and total wages and withholding.
It isn't until the annual W-2 filings that you would see a breakdown that includes number of employees and the individual pay.
Parsing tax or SS payments for what a "job" is would be a logistical nightmare, because that's not what the system is designed for (unlike the BLS's system, which is designed to count jobs).
Who has that data then? Treasury?