I worked at a company that started this yearly employee survey to measure things like engagement. We knew how to game the survey right away, making sure the first survey had low scores so there would be an MBO to improve the scores, and budget for things like go-karts, etc. Sure enough, the MBO came and the next year we improved the scores. We knocked that MBO out of the park 4 out of 5 years. The outlier was the year where we had two extra rounds of layoffs, so we got a pass for that one.