...
think about it. (imagine 10% tax at each hand it passes)
when 20 people buy something for $1k each from a shop. instantly there is $100 per purchase deducted from that amount due to sales tax. leaving $900 in circulation per person
($20k to $18k)
when the retailer spends its $18k on 10 members of staff wages, their $1.8k is deducted 10% of income tax)
leaving staff with $1.62k ($20k down to $16.2k)

...

governments will always have a inflationary currency and always tax people.  as it is the only way they can stay relevant and needed,