Amid mostly worrying news on the economy, one bright spot has emerged over the past two months. Ford, GM and Chrysler, the long-troubled “Big Three” auto makers, have seen big increases in profits and are adding new jobs, investing in, and expanding plants. The business media credits the “fresh thinking” of new management for the turnaround. But auto workers know better after more than 5 years of massive concessions and layoffs. So, we’re left to wonder: if there was “shared sacrifice” during hard times, shouldn’t there be shared gain when things improve?