If class no longer describes a clear social, economic or even political status, is it worth paying any attention to?

ECONOMIST: Class

In consequence, a twilight world has grown up, inhabited by perhaps 50, 000 people with no civil status and no social and political rights.

ECONOMIST: Those fleeing persecution deserve better treatment

By virtue of that right they freely determine their political status, and freely pursue their economic, social and cultural development.

UNESCO: Vienna Declaration and Programme of Action

But one reason this misconduct occurred was that after Citizens United, the IRS was deluged with thousands of applications for 501(c)(4) tax-exempt status, and many of the organizations were obviously political groups claiming to be "social welfare" organizations.

CNN: The real risk of the IRS scandal