
That's a fair enough post. I do have an example of such a building in Lancaster, PA (population of roughly 55k) that they built along with the construction of the convention center that they built while converting an abandoned department store into part of the overall project.
They wanted to build a convention center as a way to try and bring more people and businesses (in the form of conventions) back into Central PA. In addition to the convention center, they built an 18-story Marriott to lure the conventioners. Prior to that, they built a minor league ballpark to host a minor league franchise as another way to bring more people back to Lancaster. I don't know exactly how things are going for Lancaster since then; I moved out and into the greater Philly region during the construction phase. The ballpark has been operational for quite a number of years tho, since at least 2005 or 2006 at least.
To go with what some of the posters were saying before tho, you don't build large buildings to help spur economic development. More like, you build larger buildings as a result of economic development -- as such that demand exists for one to be built. Good socio-economic activity will lead to demand for business growth, which may lead to demand for dense development (i.e. high-rises)...