Yup, land leases for SWAs are paid for out of the Wildlife budget and not the Park budget. And I would agree that we should go back to requiring a stamp to access these areas. However, let's dig deeper into this.
Some of the more popular SWAs, like Jumbo, Prewitt, and San Luis Lakes do require the purchase of a $36 Annual SWA Pass if you are not are not a licensed hunter or fisherman. Plus, many SWAs are closed to non hunters for portions of the year, so as a hunter you get special access for your license.
Most SWAs are for actually for wildlife, particularly waterfowl, and our access is secondary. As an example of this, some SWAs are closed to the public at certain times to protect the wildlife. With that said, say we required the $36 annual pass for those without a hunting or fishing license for all SWAs. The question becomes, how many non licensed SWA users are there? And how many would purchase the pass to continue to use the SWAs?
So yes, your license helps pay for SWAs, and there are people who do not purchase a license that are allowed access to most, but not all, of the SWAs for free for most, but not all, of the year. But I would argue that the majority of users of the majority of SWAs are hunters.