Because America doesn't already have the highest per-capita rate of firearms ownership and the highest per-capita rate of homicides by firearm in the world.
Ron Wyden I see as giving in quite quickly. He ran on the idea of being a Hatfield type conservative, bucking the party that endorsed him, and then morphed into yet another party hack after he was elected, paying back those who pay for his campaigns.
Same with Rand Paul, he's just got a different set of donors than most Republicans, which can appear to be solid beliefs when they really aren't.
The flip side of corporate political campaigns, is that good businessmen don't spend money without a significant return on investment, for anything.
And you're the real moron if you think there is anything but fluffy differences between the Democrats or the Republicans. You're also a staggeringly insane moron if you want to make such sweeping generalizations, which only demonstrate you're either not interested (or incapable) of learning what's actually happening in the disparate group you're generalizing.
Grow up, the future begs you.