Anyone with a cellphone should have paid attention to the big merger news on April 29: T-Mobile and Sprint announced their intention to tie the knot after years of speculation. If it goes through, it will leave the country with just three major wireless carriers instead of four.

Less noticed, on the same day, about a dozen other corporate marriages were announced worldwide, worth a combined $120 billion. So far this year, $1.7 trillion worth of deals have been declared globally, higher than the pre-financial-crisis record set in 2007. This year’s big-dollar mergers in the United States range from Cigna’s purchase of Express Scripts, oil refiner Marathon Petroleum buying rival Andeavor, and Dr Pepper Snapple cozying up to Keurig Green Mountain. That’s in addition to AT&T’s play for Time Warner in 2016, CVS’s offer for Aetna, and Amazon swallowing up Whole Foods.

All this activity means fewer companies, which means less competition. For consumers, that can raise prices if the merged companies face less pressure to keep things cheap. That’s the main test these deals have to pass: whether regulators, including the Justice Department and Federal Trade Commission, think consumers will fare worse.

That narrow focus on consumer prices hides another, potentially more dangerous side effect. A growing body of evidence has found that as mergers thin the ranks of businesses, workers have fewer options when they look for jobs. That reduces their bargaining power and, in turn, is part of why wages have stagnated.