Sadly, too many Republicans continue to ignore that counsel, and cling to the ludicrous notion that casting a vote AGAINST something is somehow honorable (e.g., "No! I'm not voting FOR that horrid, statist RINO Republican! I'm voting AGAINST the Dem!"). As a result, the GOP leadership have no incentive to work hard and listen to their base - why should they bother? They can polish a turd and put an "R" after its name and get enough Republicans to vote for it! The result? Those elected continue to get more and more statist and power-hungry and further divorced from the people they represent
And many of those conservatives who do manage to get in are soon compromised. Never forget Trent Lott's infamous quote:
No argument.
It is almost as if the new guys all arrive and they are called into a meeting where an offer they can not refuse is posed, and they don't refuse it.