The present crisis is the culmination of a series of events that go back to the election of Ronald Reagan as President and flowed through the subsequent years as the right wing mastered modern day communications, particularly cable TV.
The pinnacle was in 1999 with the repeal of Glass-Steagall, the Depression Era legislation that brought regulation and some degree of consumer protection to the financial marketplace. The public would not be wandering the dark hall of manipulators, oil speculators, and other creeps who took the art of capital formation to a new low, making money by pushing paper and never creating anything of value.
The Reagan Administration gutted regulation administratively in key areas of commerce and finance and was followed by the Republican control of the Congress and the ascendancy of Newt Gingrich, culminating in the adoption of the Financial Modernization Act of 1999.
This piece of legislation was drafted in 1998, and over the next year the Republicans overcame all opposition. To understand what happened it is necessary to examine the legislative process and the political climate of the time.
The Republicans were dominant and the Democrats were on the run. Fearful of losing more Congressional representation, the Democrats often capitulated, fearful if they stood up to Gingrich, they too would lose their next election.
True Believers: Lead by the bill's principal author, Phil Graham, this group were cronies of the oil interests and the speculators. It included reactionaries from Gingrich to Grover Norquist.
The Supporters: These were all of the Republicans and one Democrat in the Senate accompanied by a similar alignment in the House of Representatives, though there were more blue-dog Democrats who joined the GOP. The critical vote came when the Senate version of the bill was adopted.
On May 6,1999, the Senate adopted its version of the bill on a vote of 54-44. Supporting that bill was John McCain; in opposition were all Democrats except Hollings of South Carolina. Joe Biden wisely voted 'no.'
For a more detailed explanation see this post, The crisis is so bad the financial press turns bolshie, February 17, 2008.
After the House vote, the bill went to conference committee.
The Negotiators. In conference committee, negotiators from both Houses of Congress worked out their differences. President Clinton got involved realizing that with final passage there would be a veto proof majority. The final version of the bill was adopted by the Senate in November by 90-8. Joe Biden again voted 'No.'
John McCain, in the most blatant example of cowardice, refused to vote for or against the bill. He voted 'present.'
For more detail: John McCain's lying is contagious