No Malt Liquor on Credit in Wyoming

In Wyoming, malt liquor may not be sold to a retailer on credit. (Wy. Stat. § 12-5-402(b)) Why malt liquor only, and not beer, wine, or liquor? Your guess is as good as mine.

The actual language of the statute is:
"No sale or delivery of malt beverages shall be made by a wholesaler to any licensee except for payment in full made at the time of or prior to delivery, and a licensee shall not accept or receive delivery of malt beverages except when payment is made at or prior to delivery."