Perhaps the phrase "six-figure salary" has caused wage stagnation.

Once a manager, for example, hits their personal goal of "six-figures", they feel they have hit an important milestone. So they are content year after year to privately make $100,001 but publicly/subconsciously use the misleading phrase of "six-figures". A manager's salary is implicitly the upper bound of their subordinates' pay so the whole work-force suffers.

If the goal is inspire a higher paid workforce, let's stop with the "six-figures" vagueness and use concrete income milestones (e.g., $250k a year, $10k a week, etc.) instead.