Hi, I read once somewhere about it that, if (big if), if we make large transaction to make digital and tax of digital transaction like transaction fees/banking

Hi, I read once somewhere about it that, if (big if), if we make large transaction to make digital and tax of digital transaction like transaction fees/banking fees, for every transaction we make there is x% of tax is taken by government. It may cause people to not go digital but encourage black money, but if government i.e basically us make a decision that's(non digital translation) are not legal in country. What do you think about it? I see black money, barter system creeping in but in bigger picture what do you think about it This form of tax will take people with more spending to tax more, so people who live beyond their means will be taxed more and poor people will be taxed less.