The reward increase after 5 years from now will amount to a masternode getting roughly 0.1 DASH extra and the miner getting roughly 0.1 DASH less per block. For the individual masternode owner this is about 0.3 extra DASH per month, about 3.5 extra DASH per year 5 years from now.
You've perfectly illustrated the whole fallacy of this reward ratio circus.
It's measured in Dash - which is meaningless. What is meaningful is the
value of that Dash. i.e. the purchasing power. In all your responses to my posts you've never once addressed the issue of capital gain. Sure I can cut the same piece of cake into smaller pieces and say I have more cake if I only measure the quantity in "pieces" rather than grams. But that doesn't mean you can charge more for it.
We've discussed this ad nauseum and you've failed to convince.
If there was an infinite supply of DASH you would have a point, however there's a maximum of 18 million DASH so your cutting of cake analogy doesn't fit.
Perhaps you are actually hinting on something new and not the solution you already proposed which introduces problems far worse than the one you are trying to fix.
Perhaps you hint on DASH creating a stablecoin against USD and use this to pay masternodes for their service?
This isn't some "vague theory". It's both common sense and observed fact. When market prices rise, the profit takes are driven by the holders at the biggest gain. So building a profit-taking incentive into your protocol by generating half the supply at no cost to its holder just puts an elastic restraint on the asset that snaps its price back down after a revaluation, bringing the margins back into parity over time.

So... have you checked BTC's, ETH's or XMR's chart lately? Seems that as the market prices rise, the profit takes are driven by the holders at the biggest gain. How are you actually trying to use this to support your theories on DASH, when every other crypto, POW or not, exhibits the same behavior?
What xkcdd said is so true, so I quote him here for you umbrella boy...
The analogy of this would be if we observe Tok leaving his house with an umbrella we assume it is going to rain today, otherwise not. Tok would have us draw the conclusion then that because he leaves his house with an umbrella it will rain. This is false. Rather Tok takes his umbrella because the forecasts indicate rain. Umbrellas do not cause rain. This is the same situation with the mining hashrate. hashrate chases price, not vice versa!
And also I invite you again to comment on what I already pointed out...
And here's a curious thing... DOGE is merge mined with LTC, isn't it? That means all those miners mining for LTC get DOGE for free doesn't it? Does this mean based on your theories that DOGE should be worth nothing? It's mined at 0% difficulty, no?
Oh, and in case you haven't noticed, DASH is now back above DOGE on CMC so maybe you can breath a little easier today?