How about instead of "hands off! this is mine!", we say "hands off! last time I gave you a handout you squandered it! let the other guy pay for a change."
Who is the other guy though, this means that they are wrongly thinking that they have somehow been singled out for taxation.
If the problem is gov't over spending or misuse/abuse of funds, become an activist for greater accountability (that doesn't waving signs or chanting). To simply say "find your funding somewhere else" is abandoning your duty as a citizen to hold authorities accountable.