> Minimum means the least you can do of something. For example, if the minimum amount of dollars you must pay for something is seven, then you cannot pay six dollars or less (you must pay at least seven). You can do more than the minimum, but no less. [0]
Source: the whole economy. If someone offers X, and you want Z, and you sign a contract for Y, they are giving you Y. Do you evet give Comcast an extra $50 for fun?
It's what the company supports, not what the union supports. And "performance based raises" are obviously not CoL raisesm
The fact that there is a minimum wage, and that efforts to increase it are met with resistance is proof that there are many jobs for which the minimum wage is also the maximum.
"Guaranteed minimum 3% CoL raise per year" does not mean "you only get a 3% raise per year." It is a minimum of one kind of raise, and this doesn't mean that there are no other forms of raises, or that the CoL raise wouldn't be more at times.
(reading solely from this wording, I don't work at Kickstarter and so don't know the details of the contract other than what's published above.)
[0]: https://simple.wikipedia.org/wiki/Maximum_and_minimum