By David Wetzel New York (Knewz) — Low pay. Lack of opportunity. Feeling disrespected. Those are the main reasons people quit jobs in the United States in 2021, according to a Pew Research Center study. Low pay (63 percent), lack of advancement opportunity (57 percent) and feeling disrespected at work (57 percent) were among reasons people quit their jobs, according to the Feb. 7-13 survey. At least a third say each of these were “major” reasons as to why they left. Approximately half of the people who quit (48 percent) cited childcare issues. The people included in the survey had a child youn…