Rather, there seems to be a change in the role of the government. At one point we wanted the government to engage in big projects. Now we just want the government to redistribute wealth and engage in irrelevant expressive acts (yay/nay gay marriage, faith based blah blah, forcing christian hospitals to pay for birth control).
But this tends to mirror changes in the private sector as well, so I imagine it's just a cultural shift rather than something government related.