Crypto Staking Economics

Can someone explain the economics of crypto staking?

Let me further explain what I mean. I don't mean tokenomics. I don't mean the mechanism of how it works. I mean what value creation exists (the thing the underlying blockchain is actually doing) that is sufficent to produce a double digit return. Without such a massive underlying value creation, it appears simply inflationary. Are voting right sufficently lucrative to justify this kind of payout? Is there some other mechanism that makes parties enough money via the functioning of the system to make this payout? If somebody is giving me 10%, they have to be getting more than 10% somewhere, somehow.

I'm happy for you if you've done well with staking, but that also is not the question. I've done a modest amount of searching for this and only find answers about the mechanism of staking. So thanks in advance.