It's not the least bit "stupid," and they ARE trying to kill the economy. Remember that Obama promised to "fundamentally change" the United States. The best way to do that is to get the majority of people dependent on the government, instill a belief in entitlement, sew the seeds of discontent through the use of class warfare, then crash the economy. If history has taught us anything, once civil order fails, the majority will cry out for the government to save them, and invariably that government will be a totalitarian one. Try to name just one instance where that didn't happen.
No, they're not stupid. Evil, not stupid.
Mark