It is good that other companies are catching up. But, MSFT got the AWICA and AC-21 acts passed decades ago, which directly resulted in indentured servitude. MSFT lobbyists are the founders and architects of the "indentured servitude".
I also don't really see how either act causes the problems you are describing.
This is especially true for people trying to get a green card. The employer can use the green card process to ensure the worker has no career mobility. And this process can take many years.
Interestingly it is NOT Tata/Infosys/WIPRO who are using the green card trick. They don't sponsor green cards. They just rotate people to and from the US and are very upfront about it. It's MSFT, Google, Apple, etc who are using the green card process to indenture their employees.
It's far from being exactly the same. A H1B is free to break his contract and leave USA at any point, while IS was forced (i.e. hunted down and brought back to the workplace) to fulfill it.
There was good reasons why it was outlawed along with slavery in the 13th amendment.
Having to jump through some hoops to switch jobs, or having to leave the country if you quit/get fired is not nearly the same thing. Not even close.
Getting an I140 takes about a year, and you can transfer it after 180 days. Yes it takes a long time for Indians to get the actual card. That's not a result of companies trying to get you into servitude, it's a result of poor immigration policy and massive demand from India.
disc: Work for Microsoft, run here from real body shop by using AC21 rule