In regards to strengthlifting, powerlifting, Olympic weightlifting, have you ever considered that weight classes are not ideal? For example a 220lb 5'4" man is most likely stronger than a 220lb 6'4" man for multiple reasons such as muscle mass, range of motion, and moment arms.
Why not use height classes? Wouldn't it make more sense to compare people of similar height? Then to be competitive you simply need to get stronger/gain weight instead of playing ridiculous games with weight classes and weigh ins. I would presume that people are already somewhat herded into height classes indirectly due to needing to be competitive in a weight class (with shorter people having more options), but I think directly using height classes would solve problems in the sport. For example, kids wouldn't ever cut weight if they had to compete in height classes. The only option would be to gain weight/strength with no downside to getting too strong by accidentally moving to the bottom range of the next weight class. If someone bests you it's literally because they're stronger than you with very little room for excuses.
When competing for strength, can you really compare the dynamics of a squat between two men of greater than 1' height difference and make statements about their comparative strength based solely on bar weight?
If there is a flaw to height classes that I'm not thinking of, then my next idea would be height/weight ratio classes. Somehow it should be taken into account that a 5'4" person has a drastically different range of motion and moment arms than a 6'4" person that weight classes can't address. Perhaps a 5'4" 220lb man is more accurately compared to a 6'4" 267lb man. The ratio could mitigate the differences in range of motion and moment arms, although perhaps there would need to be more to it than just a linear equation.
Should we be impressed when a short man starves himself to lift "big weights for his weight class" when someone of the same height, but two weight classes above, is clearly much stronger?
Should we be impressed when a huge dwarf of a man competes with weaker tall people instead of tall people with similar muscle mass compared to their frame?