OK, Free Republic performs a valid service of helping some baby conservatives grow up, I will agree. It is much less focused than it was 3 years ago. We now get our share of Jennifer Lopez related postings. The strong Constitutionalist bent is waning. In fact I could swear the charter used to specify "restoring our Constitution" but no longer does. Still FR is a good thing. But ...
In general there is no way to "put before people who demand unconstitional spending" anything ... they are empowered and in power and mostly in the various levels of govt. They already know what they want to do and listening to the occassional random member of the public spout off about something called "The Constituion" is not part of it.
At the minimum, you can get them to admit that they don't support the Constitutional limits on the government.
I defy you to get *ANY* government agency to admit to Constitutional limits. I chuckle at the thought of going to say a Metro meeting and reading parts of the Constitution to them. I would be ruled out of order and ejected. It's not relevant to the very important work of a)stealing more of our money and b) figuring out how to spend it... ah, another trip to one of our 14 'sister cities' must be in order to see how they keep their peons in line over there. Shanghi this time ! No, no what's the Mexican one?
With all this historical evidence about what our government must be to be legitimate, you can either get people to think, or force them to declare the Constitution "an anachronism" as you said.
No, sadly you can't. Most will ignore you and declare nothing (except we really need to spend more on AIDS research, or the homeless, or the salary for volunteer standing army, etc.)