You're seriously uninformed if you believe that Disney doesn't have sway in city and state politics. You're even more uninformed if you believe this is the sole reason Uni is spending.
I'm not defending Uni's use of tax money (generated onsite via sales and transactions BTW). Corporate Welfare is a whole 'nother problem that has been discussed plenty on this board and others.
...but to the idea that the Orlando/FL government is helping Uni while giving Dis the middle finger??? As Seth Meyers would say: