Free internet is not a "perk" to any WDW guests. All guests have to pay for high-speed access.
Disney is in the midst of a 5-year contract to outsource the Internet services. The outsouced provider is contractually guaranteed payment for every user of the system to cover installation, hardware and tech support costs, in addition to other service fees.
After that contract ends its entirely possible that Disney will re-evaluate how access is distributed throughout the property. But as of right now it's not realistic to expect free access.