Aristotle (384BC – 322BC) summed up perfectly the reason why so many improvement initiatives fail; it is because they are just that, initiatives.
I once joined a company where one senior manager repeatedly used the phrase “keep taking the aspirin”. When, after a short while, I asked what he meant he explained that the culture in the business was akin to having a thorn in your foot and, instead of removing the thorn, repeatedly taking aspirin to dull the pain. Some years later, in a different organisation, the Quality Manager complained “we never have time to do the job right, but we always have time to do the job twice”.