Sorry Tok but I don't get your chart.

Let's focus on the tallest vertical bars on the right, and let's suppose that the profits are made equal in both cases (i.e. you have equality superpowers and you decrease the miners' red part to increase the masternodes' red part, while keeping a high Dash price: 50%/50% of allowable costs, or even 80%/80% or 90%/90% if you will). How would this differ from the current situation? The taxman does not care if gains come from masternodes or miners. Overall the tax pressure would be exactly the same on the whole Dash system.