If truly the world want to end crime in the world, all the countries of the world should make death as the punishment for those that will commit crime, it will reduce crime in the world because nobody want to die young.
There are many reasons why a person becomes a criminal, but one of the biggest reasons is because their life becomes too difficult, they are helpless with their current life and have no other way to survive but to become illegal immigrants, thieves...And to significantly reduce crime rates, the government needs to provide more adequate education to its people. Providing jobs nationwide, worldwide, helping people have stable income and life. From there, I am sure the crime rate will drop significantly, not just by increasing penalties.
To solve any problem, we need to find the root cause and fix it, don't think that just applying strong measures can solve it.