Choose your charities wisely. The average is something like 66% of funds going to the actual cause, and it varies wildly between 10% and 95%+.
There is value in those other things. Administration is an important job - while it is justifiably looked down on because it is easy to bloat, there are important things that need to be done. And those administrators really should have comfortable chairs, motorized standing desks (yes both!), coffee, and other those other little things that make life in an office better.
On the flipside, imagine if they gave $7B to an anti-government group or militia to perform a coup or attack another country...
That could buy a ton of arms and equipment and likely enough funds to be successful depending upon what the ultimate goal was.