ZMP Controller expressed concern regarding the ZMP TMU's delaying actions involving M98 arrivals.

Narrative

The local PM push. TMU (Traffic Management Unit) had us metering and delaying aircraft for no reason. The final at M98 never got out past 20 miles. We were delaying aircraft 15-20 minutes. At one time all of M98 only had 14-16 aircraft total including departures. There were 10-20 mile gaps; sometimes 30-40 mile gaps; in the earlier push; the same thing. I called TMU and asked how much longer are we metering; and they said M98 has a glitch in the metering program so we are delaying aircraft for glitches. I said how about looking at the final and seeing that it is drying up and terminate metering so we can provide a service to the public. Recommendation; get rid of the metering program. Most people in TMU haven't spaced aircraft. We delay aircraft way too often for no reason or just because the metering program says so. Controllers use judgment; TMU's should have to as well. We delay aircraft way to often unduly; almost daily. Allow the controllers more say. They have a better idea of traffic situations.