Democrats have been gerrymandering since they discovered it was legal. Sure a republican was first way back when, but as soon as they realized it was legal the democrats were doing the same thing. And of course both sides complained about the other doing it when the other was in power as if they were not doing the same. Once in a while someone puts some restriction in place but this is a clear case of both sides are doing it.
Because it is a very risky thing to do. When it works out great but if it fails you are out not only your job but also the money you put into it. workers don’t really gain much, they still end up with a ceo making money and decisions.