He is not a God of the dead.:Why not?

  Mark12:27:“He is not the God of the dead, but of the living; you are greatly mistaken.”

psalm6:5"For there is no mention of You in death;

            In Sheol who will give You thanks?"

Psalm115:17"The dead do not praise the LORD(i.e Jehovah),

            Nor do any who go down into silence;"

Dare I hope for a straight answer as to why the souls of the righteous having been divested of the physical form that supposedly prevented direct interaction with the inhabitants of the spirit world and subjected them to all manner of torments would not be even more likely to praise Their God?

  If as some maintain,the account at Luke ch.16 v.19-31 is to be taken literally ,the notion of the blessed not engaging in constant thanksgiving or of Jehovah not acknowledging their devotion seems inconceivable.

 May the answer be here?: 

Ecclesiastes3:19,20:"For the fate of the sons of men and the fate of beasts is the same. As one dies so dies the other; indeed, they all have the same breath and there is no advantage for man over beast, for all is vanity. 20All go to the same place. All came from the dust and all return to the dust."