Other lending institutions do not incur retail cost including additional floor space, gondolas, counters, personnel, advertising, shop lifters, retail competitive cost, and new merchandise cost to supplement the unredeemed goods. Pawnshop customers already provide full identification with each transaction, a copy of which goes to local law enforcement. Additionally, most pawnshops maintain surveillance cameras in their stores, the same system used by banks. To require anything more than required by banks implies there is a relationship between how much money one has and their integrity. You have questioned the quality of their character based on financial status - a form of discrimination.
Pawnshops are neighborhood businesses providing vital services to the community.
To restrict zoning to other than general retail should require a very compelling reason. The compelling reason should not be historical perception. To restrict zoning there should be something wrong with the service provided, the business itself, or the customer served.