What is the main reason voters choose political candidates

To represent their interests in government.

Explanation:

The people of the country do have an interest in economic success, and will look for their representatives to do what's good for the economy.  A campaign chairman for a presidential campaign once coined the slogan, "It's the economy, stupid" -- meaning that's what people care about the most.  But ultimately voters are looking for more than just economic policies from those who govern. And while they might like government representatives to get rid of policies they don't like and favor policies they do like, doing both of those things is covered under the idea of "representing the voters' interests in government."

Political candidates know how government system works, they study this stuff for a living, for a example. Let's say you are hiring someone to be your lawyer and you have 2 options. One knows a lot of about law, they have "Master of Laws" Master's degree and or other option is a man who is famous that has a lot of public influence . You would want the guy who knows a lot about law that best fits that role, same way in politics , you want someone who has experience and knows how the system works.

Explanation: They have 2 options

b: the exchange of coined money