That's because they are making none. The "steps" (rituals) of Hajj have been the same for over 1400 years, there's no reason for such accidents to happen when you:
Know where people are headed.
When people are headed there.
The number of those people.
And most importantly UNLIMITED fucking ressources!
Knowing that many people lost their lives because incompetent idiots can't manage shit infuriates me and especially when a royal Saudi clerk (can't find an English source) says that the Sub-Saharan victims were better off dying in the "holy lands" than in their messy countries.
I am so glad I've renounced my religion, people often poke fun at the materialism of christianity by mentioning Indulgence and not realize Hajj is the most exploitive religious act anyone can engage in.
In essence, fuck the Saudi Royal Family.