Throughout my career, I’ve described this as “polite persistence is how you effect change.”
This is so important. One of the things that kills company culture before the company even takes off is getting a sense from the founders that they're just trying to fool desperate/clueless people into working for them for less than what they're worth.
The startups that actually succeed have the philosophy "find the best people and pay them a lot". All the successful unicorns and decacorns over the last 15 years have a reputation of paying people well. There is literally not one startup I can think of that succeeded but has a reputation of underpaying.
And if you're unable to pay employees well then you're simply not well-capitalized enough and should drop the project.