I'm assuming that all of these questions are specious, but on the off chance they're not I'll answer them all anyways.
What about the point where you stop working and consume less taxable items, yet continue to use or get benefit from the library, parks, roads, schools, fire, police, military protection, and other government services that you valuea and are paid for by people working and paying taxes?
Those are public goods provided by the government, which is not a profit-maximizing enterprise. The preamble of the Constitution does not begin with "We the people, in order to collect revenue from taxpayers, do hereby make public services". The role of the government and the role of businesses in the for-profit sector are fundamentally very different in a way that makes this comparison meaningless.
What about the times where you try a "Sample" at Costco, but have not intention of buying the item?
Some of those times you buy the item. That's the entire point of the samples.
Go to the Mall to window shop and get some exercise, yet will never buy?
The mall is partially a social attraction. Having other people be at the mall is part of being at the mall. Some businesses also gain from your window shopping even if you don't buy then and there - nobody buys that Buick parked by the fountain, for example. Moreover, even if you don't buy clothing X or gadget Y, you may get a coffee, go to the movies, or fill your car up at that gas station in the mall's frontage lot. It's not like you're actively driving away paying customers if you don't buy something, either, because malls are huge.