The problem with "people should aim lower" type arguments is eventually everyone is living in a tent.

The problem with slippery slope fallacies is, well, they are a fallacy.

I also see you coupled it with the strawman fallacy, since I didn't claim anything as wide ranging as "people should aim lower."

Pretty impressive to pack so much poor reasoning into one sentence.

Spending within what one can afford is a long running method of resource allocation which has served mankind for millennia, and mankind is now living at a higher standard of living than any point in history.