One of the U.S.’s founders’ primary complaints was that there should be no taxation without representation. If this is true, it’s inverse is also true: there should be no representation without taxation. If the church expects representation of their core beliefs in government, they should contribute to maintain that government.
The inverse of "if no taxation then no representation" is "if taxation then representation". "if no representation then no taxation" is the converse and "if representation then taxation" is the contrapositive. Only the contrapositive is guaranteed to have the same truth value as its conditional statement. The others must be proven.