Most working philosophers are in academic institutions, which today are not remotely interested in challenging the status quo, because the status quo and its beneficiaries pay the bills. Consequently, most philosophers in universities toe the party line and grovel and hope for tenure. Doing nothing more useful than what a good History Channel documentary could accomplish.
Deeper questions, the one's others are afraid to ask, are, in fact, being asked by radical political activists on the far fringes of society where few if any philosopher dares to go.
Today, any working philosopher who actually did what you suggest would lose their academic post.