New York (CNN Business)It's been 15 long months since millions of workers left their offices and set up makeshift desks at home.But as Covid-19 cases decline and more Americans get vaccinated, companies are beginning to establish protocols about how, and whether, office life will resume.For Wall Street banks, the growing consensus is that everyone ought to be back at their desks by Labor Day — though Citibank said it's embracing more of a hybrid model. Meanwhile tech companies are taking a far more flexible approach.Why Wall Street is in such a rush to get workers back to the officeWhy Wall Street is in such a rush to get workers back to the officeAs for workers themselves, more than half of those surveyed in a recent Pew Research Center survey said that, given the choice, they would want