It's a good idea. The problem is only how it should be decided and by whom, how much to print. It can't be government for obvious reasons.
Obviously it could cycle out of control if the amount of money printed wasn't regulated. But it could be a decent method to cut no-value-add industries (IRS, accounting).
Job mobility could be higher if you didn't have to file with the government every time you got hired. So the worker would have more leverage over the employer if they did not keep wages sufficient.
Additionally, there are many untaxed workers right now that we would then be taxing if inflationary or single tax was used. Ex, waiters, other tipped jobs, sketchy corner store that only take cash, illegal immigrants who work under the table