Most Propositions in CA can't be modified by the legislature at all.
So, while 7/8th is a very high threshold, it still means that it is theoretically possible for the legislature to draft new labor laws that override Prop 22.
Uber and Lyft are betting that 7/8 threshold will never be hit organically, but they can buy a 7/8 share of the legislature ensuring that this measure can only develop in one direction.
So, while 7/8th is a very high threshold, it still means that it is theoretically possible for the legislature to draft new labor laws that override Prop 22.