Stryker Corp.’s plans to lay off about 5 percent of its worldwide staff to cut costs—a move announced by the medical products company last Thursday—have some worried about the spin-off effect it may have in the community. It seems to be an even bigger concern, however, to some from the political standpoint. They are squarely blaming the new Medical Device Excise Tax and the Obama administration for the Kalamazoo-based company's decision. …