Antonius is right.
Rick Santorum is a faithful member of the Roman Catholic Church. His church has taken positions on economic issues with which nearly all secular conservatives will disagree, as well as most evangelicals who have a Christian worldview about economics. As a Calvinist I have massive disagreements with Santorum on underlying views of what it means to have a Christian economic philosophy.
I cannot and will not blame Santorum for being a faithful Roman Catholic. I can and will strongly disagree with him on his faith, but as long as he is a member of the Roman Catholic Church he should believe what the church teaches.
At this point I believe Santorum is the best shot we have at winning back the White House and winning the general election this fall. I'll put up with some things I don't like about his views, knowing that the reason he supports those views is the same reason he has a long track record of trying to stop baby-killers.
Politics is the art of the possible. Right now Santorum appears to be the best possibility. One thing I **DON'T** have to worry about with Santorum is the possibility of him changing his views if the polls show what he believes is politically dangerous, and under the circumstances that's good enough for me.
Picking winners and losers among sectors of the economy has zero to do with subsidiarity. Forcing sheetmetal jobs offshore by blocking the import of sheet steel has zero to do with subsidiarity. Voting pro-labor union boss has zero to do with subsidiarity.
Subsidiarity is totally consistent with capitalism, but not with Rick’s inconsistent positions, some of which are capitalist; some of which are not.