With a vote expected today on the so-called Credit Card Holders’ Bill of Rights, the U.S. House is poised to follow up on President Obama’s finger-wagging rhetoric about fees and other perceived sins of the credit industry.

But Congress should keep in mind that credit cards have been a significant source of consumer liquidity during this downturn. Now is the worst time to push measures that would curtail the availability of consumer credit, and that is exactly what the Credit Card Holders’ Bill of Rights will do.

While few of us want to have to cover our basic living expenses on our credit card, that option is certainly better than going without those basic needs. The wide availability of credit cards has helped to significantly maintain some level of consumer purchasing during this downturn.

It was the massive under-pricing of risk, often at the urging of Washington, that brought on our current financial market crisis. To now pressure credit card companies not to raise their fees or more accurately price credit risk, will only reduce the availability of credit while undermining the financial viability of the companies, ultimately prolonging the recession and potentially increasing the cost of bank bailouts to the taxpayer.

The Federal Reserve recently issued regulations targeting practices in the credit card industry. While this regulation was itself overkill, it should be given an opportunity to work, and be modified if it results in significant contraction of credit. It is far easier to go back and change harmful regulations than legislation.