For the same reason the government hasn't broken up anything since Bell System in 1983: those 500 million that Google pays Mozilla is higher than FTC's entire y

For the same reason the government hasn't broken up anything since Bell System in 1983: those 500 million that Google pays Mozilla is higher than FTC's entire yearly budget (430 million in 2023). It takes years to build a strong case, and companies can easily throw more resources at a problem than that. Monopolies don't even need to win the case, just drag the whole process on until the next election cycle, when all of a sudden the next administration is far less interested in following through. Rinse and repeat indefinitely. Technically even Bell didn't lose a case, it broke up "voluntarily" before that happened.