This is true everywhere. In India the SC/ST community have a lot of reservations in all colleges, Govt. jobs, Govt. procurement etc. Even after 70 years these were introduced and increased in % sometimes seats do not fill up. What has been observed is that the same group of SC/STs who mostly got everything hand delivered to them take advantage of the system. You see 3 generations of the same family utilizing the benefits. At the same time the really poor , remain poor.
This is more of a policy and political (changes cannot happen now otherwise there will be riots ) failure. No system can be perfect meritocracy, sometimes one just needs to suck up. Taking the comparison elsewhere one can argue effectively that where we are born is a matter of luck etc.
Personally i do not question policy intentions however always hope for better implementations in the future.