Wage slave/tax slave aren't mutually exclusive.
Fans of big government don't use "tax slave".
If they did, they'd have to face the reductio
ad absurdum conclusion that taxation is
slavery, which would make "wage slavery"
sound ridiculous even to them.
I bristle at liberals who diminish the evil
of actual slavery by applying it to employees
who don't earn as much as they need / want.
Some people just aren't useful as workers.
If you want to give them enuf money to
survive, that burden should fall on taxpayers,
spreading the burden among the many
instead of the few.
Besides, being forced to pay someone more
than they're worth would simply mean never
hiring them in the first place. The ranks of
the unemployed would blossom.