Pre-16th Amendment:
"Ok, you want federal healthcare? That will cost each of you $10,000/year in taxes."
"Um, nevermind."
Post-16th Amendment:
"Ok, you want federal healthcare? That will cost most of you nothing, we'll usurp the healthcare system, tax the top 50% of income earners, issue debt to China, and print fiat money to cover it."
"Hooray!"