I don’t know about chazal, but the Author of Chumash and Navi is clearly limiting slavery among Jews themselves in various ways. Thus, slavery, is not an ideal state for a human being. We have a brocha for that. It seems like a good reason, that if you live in a country that is reasonably good to you, you would not want bad things for them. In our days, most things that slaves used to do, free market, machines and computers can accomplish. So, it is hard to make a case that some human being need to be enslaved to facilitate your Torah learning – beyond those who work in the fields to grow coffee, then those who transport it from overseas, then package it, send it to you and send you a coffee maker. If you really need someone to press a button to brew the coffee, your wife might do it for you.
Menu