Can someone fill me in on why the wwe is the place to be for just about every wrestler?

Im not bashing wwe or anything, but every wrestler wants to be in the wwe. Even great wrestlers such as Low Ki,Kharma, Booker T, and indy wrestlers. Im sure just about all the tna wrestlers would switch over to wwe if given the chance. Even Kharma wanted to be apart of the wwe despite the divas division been poor. Is it cause the everyone respects the wwe?