I guess you are indicating towards a pre-90s era when there was no concept of neutral umpiring in cricket but again back then every cricket playing nation had this problem.
In the early 90s neutral umpires started featuring in test cricket, also i don't remember any major instance where umpires were deliberately helping the Indian team.
But i do agree that BCCI do have a habit of being reluctant on adopting tech at the start or any new things, although it's changing nowadays, not fast enough but it's going forward as they recently announced the adoption of more technical stuff in Ranji like DRS etc
Well.. now neutrality of umpires doesn't matter much, because we have the option of DRS. But still, there is a need to eliminate the "umpire's call" loophole. The fact that BCCI don't want to use latest technology in domestic cricket may have something to do with financial reasons. Indian domestic cricket consists of 38 first class teams, and a huge number of matches are being played every year. Implementing technology such as DRS will require additional manpower, and extra funds. And I am sure that the BCCI guys may not be happy with this requirement.
I've said a few times that the "Umpire Calls" rule should be scrapped, IMO if a ball is touching the stumps even for 10% or even clipping it (the current rule is for more than 50%) then it should be out but I guess ICC willingly leaving some scope for human error in umpiring despite tech is available there to use.
Yeah, a huge number of matches in the domestic circuit could create a financial burden but we can't deny the fact that it does help players immensely. I think they will use this according to grouping (relegation). Also, I'm in favor of using full fledge technical/technique analysis for players so that BCCI can identify and tackle their weaknesses at a domestic level, shouldn't cost more than $10-15 Million per season for satisfactory results.