Dash is a masternode coin, with 38% of its supply 'locked' in masternodes earning yield, it is crucial to pay them an attractive rate to hold that value.  Currently MNs pay about 7.5% annualised (Dash on Dash), however, the current risk free rate is 4 to 5% (money market, short term treasuries), so increasing the allocation to masternodes is required to attract new investment.  Luckily, in Dash much of the security traditionally derived from mining has been shifted to the masternode network, eg by means of ChainLocks, a Dash invention that was later also adopted by Dash copy cat, Firo.  ChainLocks prevents any chance of 51% attack a large attack vector for traditional POW coins such as Bitcoin and Litecoin.  Further, coming in v20 (our next release) the entropy used for creating quorums (another Dash invention) will no longer come from miners, but rather come from the CLSIG message which will be mined into every block.  This further reduces our need for a massive and wasteful mining outfit.  For these reasons, we should focus on reducing the portion of the reward paid to miners and diverting those funds to the DAO or the masternodes.

For reference, here is how the subsidy is currently dispersed in Dash.