A lot of players in the economy are realizing this is a sustainable expansion. That's a factor you must have in order to support increased hiring.
There are a lot of good factors out there.
More globalization means there's more pressure to increase productivity, not to reduce it. No pricing power means there's more pressure to increase productivity, not less, ... There's so much pressure to push it higher, it will be difficult for cyclical factors to push it lower.
I think a seasonal factor is part of the issue here, but you can't discount it all. Look at what is happening with chain store sales. They've been pretty weak. Some of it (weak retail employment) is real.