It pays to be married to Miranda Lambert! The country music star, 35, is making sure that her husband, Brendan McLoughlin, is living in the lap of luxury, splurging on a new NYC apartment for him to live in during their long-distance marriage. “Miranda has totally upgraded Brendan’s life. Being a cop, he wasn’t exactly rolling in money,” reveals a source, adding that the 27-year-old’s parents often helped him out financially. (The starting salary for an NYPD officer is $42,000 — a far cry from Miranda’s estimated $45 million fortune.) However, the “Vice” vixen “doesn’t mind spending the money to make him happy,” Life & Style’s source admits. “Miranda likes having the upper hand in her relationships, being the ‘alpha’ partner.” After divorcing Blake Shelton, 42, she dated aspiring singer…