Virtually Nothing that justifies their pay grade. Yes "M" ,  you are right : in other retail setups they have to pull their weight many times over. But here these light weights cannot pull even their own dead weights.  These Glorified clerks cannot even do minimal clerical functions.  They are abysmal failures with people, projects, processes, policies and very definitely with making money for  the store- And  customers   one on one : zero Intrapersonal or interpersonal skills! Which truth be told is what T is all about.  Simply :  They cannot perform tasks -cannot  execute. Period. They are hired  by level above the  store to help the store director. In turn he/she has them to blame for they lack of any capacity...any wherewithal. They  have no intrinsic or extrinsic capacity. What can you expect of poor achievers that they are modeling themselves after other poor achievers in their lives.   Result: They drain they place from what  it could do .
This is a position that by its  poor hiring standards is set up to fail.  And it  does and will …...….Until the model as M says is brought into effect **   where they are  required to perform as in other retail business  models.
T is young …...…......….but  this ETL position in it present state of  Poor functioning  is already  an anachronism. 
You might say  T is very successful.  Hogwash  !  It is like saying a Millionaire is rich ......In relation to what ?.. A Pauper.  The day of Millionaires being rich  is history***.
Not until Mega Millions...A  Billionaine at least . Any Company  that is complacent with it belief that  "enough is good" will be a has been.
ETLs  are  the Flipside of  Excellence that  is otherwise what is required of them.
Enough said
** In  some Pilot Stores where they (should be, if Not already  ) asked to perform incrementally as Leaders or managers in other retail business do at first  and the effort fleshed out to fulfill a Full functioning role …… simple  as do or don't  and that would separate the  men and women from the boys and girls...…… But would that happen and CAN that happen .
Perhaps NOT  . The reason lies  in T hiring a low functioning milieu  as  that is what they really want  with the  Low low pay and compensation. "All the better my Dear, to keep you under my wing " says the Big red hen .
***  A once household name Eastman Kodak is a has been . No body under 30,   Okay  20  , would even know of their name .( what , after  more than a hundred years?!)  They lost the Imaging 'space'.
If you cannot move forward you are left behind ….The Big Bulls eye gets smaller and smaller in ones vision.
You don't  want that  to  happen . (  I hope!) .  We  don't want that to happen.   I don't want that to happen  ( I know !).  Providence may be the Answer. And I believe in Providence . Lets hope........And  the Answer my friend  is in  Making It happen.  I hope for T  that the powers that are   (or be) Make it happen.. But pulling their heads  out of the sand ...................... And  the ostrich lives  .................Can even even strut , dance and thrive  ( yeah,   multiply ! )