Quiescent current on OFF/ON controller ICs seems high
6uA typ or even 20 uA max is not much  “power”.

The Maxim IC’s you selected are designed for 5V logic only/

If you need high voltage low Quiescent current switches, you can choose MOSFETs or BJT’s to suit your task and choose low side switching for logic level drive.

If  you define all your specs, for input  and output V,I etc. Then you can start your design rather than look at IC’s and ask why these do not do the undefined tasks in your project. 

Specs 1st, (must haves and nice to have for all inputs, outputs and environment) 


then decide on topology,   technology &amp; find off-the-shelf solutions , figure out how it works, 
then decide ,  Make  or Buy.


This is how design is done.

P.s. all transistors have tradeoffs for V limit vs hFE vs GBW vs power rating vs leakage current vs slew rate vs current limit or Ron.