High/Low fighter concept, does it work?

For starters, the High/Low concept means a mix of larger, more expensive and more capable aircraft and smaller, cheaper and simpler ones, think F-15 and F-16 or SU-27 and MiG-29. I’ll cut to the chase and say I personally think the concept is flawed as one of the aircraft programs always seems to end up “cannibalizing” the other due to politics or other causes. Look at the way the still fairly new F-14 was badly neglected once the U.S. Navy took delivery of the F/A-18, or how the F-16 almost equals and may eventually surpass it’s much more costly stablemate in capability because of the much great developement attention it’s recieved. I think a nation is better off choosing one platform and sticking to it rather than choosing two types with overlapping roles.