A new talking point of the Left: older Americans against Obamacare are hypocrites

A new talking point of the Left: older Americans against Obamacare are hypocrites: "According to the Left, older Americans are hypocrites to protest Obamacare because they use Medicare.
Many opinion articles have been written about this hypocrisy of the elderly. There was the Newsweek article titled, Health Care Hypocrisy, where Daniel Gross wrote:

After the stock-research scandals of the 1990s, analysts were required to disclose whether they or their families owned stock in the companies they were talking about. That has since emerged as a key gauge of credibility. I'd like to see something similar for the health care debate. Before they weigh in on the prospects for health care reform, interview subjects—pundits, talking heads, policy wonks, editors, members of Congress—would have to disclose whether they or their family members rely on taxpayer-funded health insurance."