This goes in complete opposition to every single study ever performed on this matter. Higher speed very directly translates into higher risk of accidents and higher risk of fatalities or serious injuries per accident. Now, it's true that there are cases of occasional unscrupulous places placing onerous speed limits only to force fines (I've seen places on highways that are normally 100 km/h that have a short portion of 30km/h on flat straight land with no houses around, but with a good place for a police car to stay hidden), but these are the exception and nowhere near the rule.