Liberals may vote for favors, but mainstream so-called conservatives vote for "security" on the public credit card, as well as unfunded tax cuts for the very wealthy. (Look at the debt explosion under Reagan and Bush II.)
Making this about parties misses the point: they're playing for the same team and serving the same masters. All else is theater.
I don't exempt Republicans from my scorn, but the quoted text seemed to be an excuse to let the liberals off the hook in the name of non-partisanship.
I could cite plenty of examples in which the Republicans eroded our civil liberties and grew the military machine as well, but that didn't seem to be what the grand-parent was objecting to.
The OP included three party-focused paragraphs, one for liberals, one for conservatives, one for libertarians. Only the first one, trying to motivate liberals, was quoted.
Making this about parties misses the point: they're playing for the same team and serving the same masters. All else is theater.