Why are sales people considered to be the quickest employees who switch between jobs?

Because of quick career development. 

Fully endorse the detailed answer by Mr.Ibrahim Hussein Mayaleh.

Day by day Sales persons are getting more familiar with their jobs entrusted and keep excellent contacts with customers; many companies try to exploit them maximum leaving not much scope for monitory or non-monitory motivations as they deserve.

There are several reasons why sales people move from one to another job. Some of these reasons are:

1. Sales people are pioneers in the market and due to the nature of their job, they come to know more people in the market and therefore come across many opportunities.

2. A sales job is full of challenges, that make sales people get used to keep looking for new challenges

3. Sales people are usually put under stress (targets, competition, customers and management)

4. Due to the frustration they experience from drawbacks that keep them from achieving their objectives. For example, they often have to say NO to customer due to company's regulations. 

5. Part of the competition game in the market, many companies hunt on the most strategic talents employed by their competitors: usually sales talents.

Because just sale persons who knew that the real reputation of company and face to every one in the market by face to handle your company's good will ,

Because salespersons deal with all sorts of different people and therefore when dealing with a new client is like dealing with a complete different job. Each person is different and has different goals, personalities and challenges, and a good sales person needs to keep these in mind to succeed.

Because sales person need to learn and explore many things which can't happen working with the same company

Due to achievement oriented ….

Because sales skills are developed very fast is practiced often and appropriately. Any person can go to0 to10 in one year with intensive theoretical studies and practical application. Also proper management and guidance. 

I personally improved my skill in the way i mentioned above and after6 months i have found a job with much higher salary that i could never get6 months back.

Sales persons are the key motivators in any industry.They need to achieve and to maintain competitive

advantage.

There are several reasons why a sales rep moves from one job to another quickly, including the pressures exerted by the management companies such as increasing the sales target is not commensurate with the purchasing power, or feeling delegate that he did not receive a commensurate with the effort of his work to the lack of incentives, it is possible that not to be a sense of job stability strong motivation to search constantly for another job, there are many reasons why a salesperson feels that the weakest link in the system sales of many companies through lack of interest of training courses that help develop skills and stimulate sales rep. It is possible that the reason behind it is the weakness of administrators the ability of those responsible for the management methods of work teams. It is possible that the reason is due to the weakness of the delegate and his inability to develop resorts to search for another job.

Most of the times the following may the reasons

• Due to non-compatibility with immediate Boss
• Due to unwanted or illogical pressure
• Due to lack of motivation
• Due to uncertainty about future growth

In most of the companies, they treat front-line sales team like a puppet and take them for granted. Very chosen or edited  information will be made available for them about the company for example annual or quarterly business plan to achieve.

When sales team confront hard facts in market due to lack of vital information to fulfill their job, they feel helpless and betrayed and frustrated. when this kind of encounters becomes frequent it will have compounded effect on the employee and result in decision to look for some other better opportunity.