During the Great Attrition, millions have left their jobs in search of better chances of advancement.

A recent large-scale study found that skills acquired on the job, as opposed to through formal education or outside-of-work vocational training, are linked to half of the average person's lifetime earnings, making continuous learning critical to raising incomes.

The average worker switches roles every two to four years. 80% of moves over a decade were people moving from one employer to another.

• Companies can position themselves in the flow and learn to ride the tide gracefully.
• Companies that build a reputation for career development can attract the best out of the huge talent pool that is always searching.
• Employers can also benefit from making job movement within the boundaries of their organizations more fluid.