Fair - I meant title as a proxy for the work that's actually being done. My point was mostly that raw experience is only meaningful up to a certain point.
To be a bit longer-winded:
If you want to get paid more, you have to demonstrate value. Even if you only ever write the same CRUD apps, you'll definitely improve for the first few years, and it makes sense to pay more for a developer who isn't still busy making their first mistakes.
Past a certain point, though, raw experience isn't automatically a value add. If you're still just writing the same CRUD apps, you cap out a certain point. Now you need to demonstrate that you can contribute to architectural discussions, get involved in system design, or help with project selection/management. If you think you deserve the big bucks for that level of highly experienced work, that's totally fair, but you need some way to demonstrate it - whether this be tiles held, references, or having literally written the book on the topic. You can't just lean on "years of experience" anymore, because it's no longer well-correlated to value-added.