This is how competitive companies compete for the best employees and makes sure employers treat there employees well.

Example: Company A hires a really good Bank Officer who works hard and increases there yearly profits. But treats him poorly, no yearly increases. Etc etc.

Company B knows that Company A has a really good Bank Officer on staff. Company B offers him a counter offer of more salary, or benifts for his services to increase there profits.

Since Company A treats the Bank Officer poorly he accepts the offer and moves to Company B. Company B now becomes more successful in the long run, with increased profits. Because of professional qualityed staff and staff retention.

Company A, closes its doors and becomes bankrupt.