Bill gates and potential slave labor ?

Bill Gates was testifying in Congress and bringing cheap research labor. Here is a man that is worth Billions yet seems to want to pay less for research people. How can a man worth that much money wanting to make more billions. If these people are so afraid to pay decent wages then in the end will he be like the Dukes,etc in Europe over the Dark ages and in their standard of living just living in dark damp castles. That is where Capatilism can go wrong and wind up destroying civilization and we have to start all lover again. Bill Gates talks about educating people yet is unwilling to pay those people to want to get an engineering education to keep our middle class going and or our civilization going and improving. This is the problem of letting our rich people get richer and not paying their real share of taxes that they should owe. Money still talks and the more a person makes the less is the cost of living them. The more money that a person gets so the standard of living goes up. This is normal and I suspect I would do the same thing. I would like to have a private jet etc too. The rich have to be taxed or the middle class tends to becomes the slave after awhile and the whole civilization goes down. I can not believe I stuck to one subject this time.