Just as a side note to debunk this "You'll understand when you start paying taxes" nonsense - virtually everything you purchase is subject to tax.
Just because someone might not be paying income tax currently doesn't mean that they aren't contributing to tax revenue.
Even for the things that technically aren't taxed, say if your country has provisions for necessary foodstuffs to be exempt from tax at the point of purchase for example, how do you think that loaf of bread is manufactured, transported, stocked on the shelf and sold at the register?
If you answered "By a very long supply chain with a variety of inputs, such as electricity and petroleum and labour, most of which incur their own taxation" then you understand how tax exemption at the point of purchase doesn't mean that it's tax-free - there's almost certainly tax being skimmed off the top at every step of the commodity's journey.
So yeah, you do pay taxes and people who accuse you of not being a taxpayer are economically illiterate and they deserve to be ridiculed.