Is the proposed solution to this masonry project okay?
If you had an professional engineer design the whole unit as an assembly it may be possible to have the railings and metal concrete reinforcing members in the steps and risers work as a trussed span structure that was only supported at the bottom step and at the top step. 

This is definitely not a project for any local neighborhood handyman, general masonry contractor or DIY type work. Also do not expect this type of project to be low cost.