Government has already, at various times, instituted some rather unsavory taxes . . . I see an attempt to bring these back.
* Personal property tax - everything you own is taxed. Cars, TVs, jewelry . . . everything. When I was a kid they had such a tax in Illinois, but widespread noncompliance led to it being abolished. Look for it to come back in some form.
* Tax on "imputed income." I already get nicked for my employer-paid life insurance benefits, but look for this to expand. (Own a home? What you save by NOT paying rent can be considered "imputed income.")
* Capital tax. Not a capital gains, tax, but a tax on capital itself. (In this vein, I understand some states used to include things like stock ownership in their personal property tax calculations.)
* Tax people by the mile for what they drive. (People with fuel-efficient cars aren't paying their fair share of gasoline taxes.)
And of course, they can always tack on "fees" and "charges" without calling them "taxes."
And consider . . .
the expansion of government power that it would take to enforce these.