Education never was the "Great Equalizer". Its purpose has always been "to educate people in what they need to know."
Now, "what they need to know" differs by caste.
The high caste learn how they deserve their privileged position, how to perpetuate their position, and who are the key players.
The medium caste learn how to set up or run business and merchant operations, how to be an exec, how power works, who are the key players within their field, and how to cultivate their networks.
The low caste learn how to do the jobs they're destined for, how to take orders, how to climb the ladder (somewhat), and hopefully how to politick at work.
The bottom caste are lucky to learn anything beyond reading, writing, and a smattering of arithmetic. They might learn a few things to help them in their jobs, but there's really no point since they're easily replaced anyway.
Education follows our birth caste. That's all we're raised to realistically aspire to, and that's also all the higher castes will allow for you unless you get VERY lucky (i.e. someone wasn't paying attention), or someone throws you a bone (scholarship or the like - and even then you're limited in how far you can rise without resentful pushback). New money is always frowned upon for at least a few generations.
Most of us are in the bottom two castes. Medium is reserved for the 2% whose families are wealthy and influential enough. I doubt you know anyone in the high caste.