Honestly, I think it's ok to have people who collect garbage. It would be completely inefficient to have everyone individually handle disposal of waste. And, in turn, the people who perform the essential service of garbage collection should be celebrated for their work. In a pre-communist world, this means they should be compensated well and have good benefits.

There's a big difference, I think, between relying on garbage collection and, say, looking down on garbage collectors or making their jobs harder by throwing away things you're not supposed to put in the trash.

There's no need to feel guilty about it in the abstract.