Any member of a party that is headed by Barack Obama should tread carefully when throwing around charges of elitism.

(CNN) — Mitt Romney’s opposition to Buffett Rule may be “because he’s exploiting all of these loopholes” in the tax code, Rep. Henry Waxman charged in a Democratic National Committee conference call on Thursday afternoon.

Waxman launched into Romney for a lack of transparency as Democrats have put the Republican presidential nominee under another wave of pressure to release tax and financial documents.

“If he’s not paying his fair share and he doesn’t want other gazillionaires — many of whom are going to be together with him and Vice President Cheney in Wyoming — [they] will continue to avoid their fair share,” Waxman said.

Waxman sought to tie what Democrats saw as secrecy employed by former Vice President Dick Cheney to Romney. Cheney hosts a high-dollar fundraiser for Romney on Thursday at his Jackson, Wyoming home.

“Let’s not go back to a time – to the years when people acted like they’re entitled to keep everything secret, that they’re entitled to run the government and the American people are not to be permitted to know what’s going on because they know better than the rest of us,” Waxman fired.

“This is an elitism. It’s a sense that they’re better than anybody else — they’re entitled to all of the money they have and the rest of us should just grin and bear it because they’re the ones in charge,” he continued.