A match is not a "perk" – its a component of an employee's compensation.
XOM is paying its employees 7% less. HOW SHOULD EMPLOYEES RESPOND?...
Employees should exert 7% LESS EFFORT. Engage in a work slow-down. Delay responding to emails. GUM UP THE WORKS. Slack off as much as you can. Do what you can to impair shareholder value — just do it in such a way so that they can't pin anything definitive on you.
They hit you; you gotta hit them back. Make them feel some pain.