In his public resignation letter in today’s New York Times, former Goldman Sachs executive Greg Smith said that one of the fastest ways to get ahead with the firm is to persuade clients “to invest in the stocks or other products that [the firm is] trying to get rid of because they are not seen as having a lot of potential profit.” He lambastes a firm culture where colleagues openly boast of “ripping their clients off.”

The sad thing is, this sort of shady behavior might well have been on the way to being curtailed if not for the actions of Sen. Scott Brown (R-MA). After Brown was elected to the senate in 2010, he threatened to join a Republican filibuster of the Dodd-Frank Wall Street Reform and Consumer Protection Act, using that threat to significantly water down the bill. Among the industry-favored concessions he extracted was weakening of the “Volcker rule,” which was meant to curb risky speculative investments that do not benefit customers.

Thanks to Brown’s maneuver, the final bill upped the amount of risky trading big banks like Goldman could engage in, increasing the amount of gambling they’re able to do by billions of dollars. Since then, financial industry lobbyists have been hammering away at the the rule in an attempt to render it completely meaningless.

The financial sector, of course, has repaid Brown with a flurry of campaign contributions. Between contributions from the firm’s leadership PAC and contributions from company employees, Brown has already received more than $40,000 in campaign cash from Goldman Sachs this cycle.

Republican presidential primary frontrunner Mitt Romney (R) is taking a break from the campaign trail a day after finishing third in the Alabama and Mississippi primaries, stopping in New York City for multiple fundraisers and a visit with campaign surrogate Donald Trump. Romney will attend three fundraisers and haul in an expected $2 million this week, bolstering a fundraising total that has already made him Wall Street’s favorite candidate.

More than any other institution on Wall Street, Romney has ties to Goldman Sachs, the firm that was slammed in a New York Times editorial this morning by a resigning executive director who decried the firm’s “toxic and destructive” culture. Romney and his wife, Ann, have investments in almost three-dozen Goldman Sachs funds valued between $17.7 million and $50.5 million, according to his personal financial disclosure forms.

No Wall Street bank has been as generous to Romney’s campaign, his leadership PAC, and the super PAC that backs him as Goldman. According to an analysis of Federal Election Commission reports, Goldman Sachs employees have given the Romney campaign more than $427,000 during the 2012 cycle, nearly twice as much as he has received from any other major Wall Street bank (Citigroup employees have given roughly $274,000 to Romney, the second-largest amount). According to OpenSecrets.org, total contributions to Romney from Goldman Sachs, its employees, and their immediate family members totals more than $521,000.

The Free And Strong America Leadership PAC, which is affiliated with the Romney campaign, has received $30,000 from Goldman Sachs employees during the 2012 cycle. Goldman employees and their spouses, meanwhile, have given $670,000 to Restore Our Future, the super PAC backing Romney.

After making billions of dollars in the run-up to the financial collapse of 2008, Goldman Sachs benefited from a federal bailout that saved Wall Street banks. The company, like other Wall Street firms, stood opposed to the Dodd-Frank Wall Street Reform Act that was signed into law in 2010 and also fought regulations in contained, such as the Volcker Rule, which would prevent proprietary trading that made the bank billions but left taxpayers on the hook when it nearly collapsed. Romney has rarely missed a chance to tout his opposition to the law on the campaign trail, announcing that he’d repeal it even before he read it.