Today, executives have numerous job options, due to which they often change jobs for the simplest of the reasons. They should rethink their decision due to two reasons.
One, they reset their stock of credibility they have gained with their employer to zero. Their entire experience of few years is brought to zero because they have to fight again to prove their credibility in a new set up. Credibility does not depend on the skill they have gained in the earlier job. It depends on the track record they have created on the jobs done, on the promises they have managed to keep despite the difficulties, on the support they have provided to the teams while delivering the tight schedules, on the kinds of problems they have solved and above all the 'trust' they have gained of their immediate superiors. All this stock is reset to zero. In short, they reformat their disk storage of credibility and start afresh. For a career, that is a definite loss.
Two, they often claim to have changed jobs because they did not get what they wanted in terms of experience. It is important for a youngster to learn to keep his expectations in check, because the world does not run according to his timetable. Instead, these youngsters get impatient too soon and want to jump to another company just because other company is 'offering' something they want at that point of time. Little do they realise, that they will face the same situation again in a new company. These situations are therefore learning experiences where the youngster has to learn to cap his aspiration and wait 'patiently' for the right time.
Worse still, they often change jobs due to 'ego' reasons, due to conflict with boss, or even because someone got more raise than them. Managing a difficult boss is another learning experience that one should undergo at a young age. If the youngster fails to utilise his experience, he is less equipped to negotiate the difficult boss at senior level (if he is unlucky to get one), when the stakes have considerably risen. At that time, he will have noone else other than Fate to curse.