: because they cant. If they can do it today they might be able to do it tomorow, but next month...phew - theyre running out of resources just thinking about it.: Bottom line - companies have a bottom line, not an infinite and constantly replenishing reserve of capital with which to fend off every competitor for ever and ever amen.
However Gee in the long term if developments since the war at least are anything to go by these companies becoming increasingly powerful and rich will eventually have the capacity to do what I've indicated, daunting considered I dont like their capacity to trample all over everyone as they do currently.