I think so. I've watched too many pure science missions get scrapped or severely delayed by budget constraints. Our exploration of the Jovian system, for instance is far behind what it should be in my opinion. We have determined that there is liquid water under the surface of Europa, and proposed missions to study this fascinating world that could quite possibly host extraterrestrial life. Unfortunately, these missions keep getting scrapped, most recently JIMO, due to budget constraints.
Juno was scrapped not only due to this but because it was deemed 'too ambitious.' Wha? The frontier of space is one of our best venues for being ambitious. The technology that this mission would have pioneered could have very likely led to key advancements that would have facilitated our current holy grail of space: the manned expedition to Mars, to speak nothing of what more we could learn about the moon itself, and the liklihood that it harbors life.
I am all for a mission to burrow under the ice and check for life there. If there is life, this could be the most influential discovery of our history in how we view ourselves and the universe - and yet this goes un-pursued in favor of a mission to orbit the north pole to examine the magnetic field of Jupiter itself. While the science benefit of this could also be great, it's hard to get general public interest inspired by the most detailed map of the Jovian magnetosphere to date.
I also agree with Mercury in that the private sector should also be stepping up. There are the first rumblings of progress along these lines, and quite possibly with a successful venture in space tourism, there could be a new gold rush in space by the private sector.
I just don't feel that the private sector will pursue the science missions that government agencies such as NASA will, simply because pure science doesn't produce cash flow. Applied science does, but applied science relies often on the facts learned first through pure science - honing these new discoveries into everyday applications that both benefit mankind and the private sector's coffers.
I feel that our ultimate destiny is to reach the stars. If we do not try to achieve this goal, then we certainly never will. We must never lose sight of our chance to grow beyond what we are today.