I am afraid you are a bit late to this discussion. This proposal is a continuation of what started with @ek826 proposal here Refactor Burn AnteHandler and deprecate Seigniorage Reward Policy - Governance & Proposals - Terra Research Forum and has now been put to vote.
Please read through the discussion on @ek826 proposal first and follow through to this one here, to get the ins and out of how we got here. There are also some projected cost profiles there which fed into the values you see here.
Yeap, the chain will start to provide funding for its maintenance/support the way any other blockchain does.
Zaradar is still talking about a code-based solution according to the initial proposal @ek826 raised here. Based on that, half the income from on-chain burns would be hardcoded to fund the community pool for dev purposes.
This proposal is a continuation of that one and takes a slightly different path, which ensures dev funding and at the same time respects the BURN effort making sure anyone (CEXs, Individuals, on-chain tax) sending money to the burn address will BURN in its entirety.