EVV controller described simultaneous cancellation of take off clearance/go around event when a departure failed to expedite takeoff as requested.

Narrative

I was working Local Control. Air Carrier X checked in on visual approach Runway 22. Shortly after; Air Carrier Y reported ready for takeoff at the approach end of Runway 22. Air Carrier X was between 3-4 mile final; and I cleared Air Carrier Y for takeoff with no delay. After a short delay; Air Carrier Y read back the takeoff clearance and stated no delay. I then advised Air Carrier X of the departing traffic. Air Carrier Y proceeded slowly onto the approach end of Runway 22. After another delay; I reiterated 'no delay please' to Air Carrier Y. He read back 'roger' and began rolling down the runway at taxi speed. About one minute after I issued the takeoff clearance; Air Carrier Y was still very slowly taxiing down the runway. I saw there would be no way to maintain the required 6000 ft runway separation between the two jets. I canceled Air Carrier Y's takeoff clearance; then immediately sent Air Carrier X around. At this point; Air Carrier X was approximately one half mile final. Air Carrier X began the climb and overflew Air Carrier Y on the runway. While there was no loss of separation; an unnecessary go-around was caused. I believe causing factors were me trying to unnecessarily get one aircraft in front of the other to expedite traffic flow and Air Carrier Y's delayed takeoff. Recommendation; I'm not sure how the pilot could be further encouraged to take off sooner. Building a larger gap ahead of landing aircraft would be beneficial. Also; implementation of TIPH procedures would greatly help similar scenarios at our airport. TIPH would not have affected this incident; but there are often times where controllers have to get airplanes closer than necessary because TIPH is not available to us.