Of course, the growing importance of wealthy donors is not exclusively a Republican phenomenon. Democratic candidates have also benefited from the largess of wealthy donors like George Soros, Tom Steyer and James Simons. But on economic and tax issues, big-money liberal donors have not really shoved their party to the far left. Donations from Wall Street and corporate America have, in fact, pushed many Democrats to the center or even to the right on issues like financial regulation, international trade, antitrust policy and welfare reform.
Further, liberal donors have been nowhere near as skillful at coordinating their giving as conservative donors have been. No liberal organization comes close to rivaling the network of donors and political activists created by the conservative Koch brothers, says Theda Skocpol, a professor at Harvard, who has written extensively about these issues. The Koch network has spent years methodically pushing state and federal lawmakers to cut regulations, taxes and government programs for the poor and the middle class. The leading donor network on the left, the Democracy Alliance, is smaller and much less successful.
Even allowing for money “wasted” on losing candidates and failed causes, the donor class has notched many impressive wins. Tax rates have fallen substantially, with the top marginal income tax rate now just below 40 percent, from a high of 70 percent when Ronald Reagan won the presidency. The top corporate tax rate has dropped to 35 percent, from 46 percent in 1980, and many businesses pay an effective rate that is much lower than that. While supply-side economics remain mostly a Republican fiction, politicians from both parties have supported the effort to reduce taxes on capital — profits, capital gains and dividends — on the grounds that this would spur investment and make American businesses more competitive.