Where Has All The Logic Gone?

Today, Ruth Marcus wrote an article in which she somehow reasons that Congress has the authority to mandate individuals to buy insurance. She advocates two "Constitutional" modes of doing so: the always "reliable," Commerce Clause and the power of Congress to tax. She goes on to say:

If you arrive uninsured at an emergency room, that has ripple effects through the national economy -- driving up costs and premiums for everyone. If you choose to go without insurance, that limits the size of the pool of insured individuals and -- assuming you are young and healthy -- drives up premium costs.

Taken to its logical extreme, Ms. Marcus' logic implies that Congress has the power to control everything Americans do with their money.