City Comptroller John Liu is facing allegations he inflated salaries for security guards employed by city contractors, all for political gain.

Two private security firms are suing Liu, saying he unfairly hiked the minimum hourly rate as high as almost $19, including benefits.

That is up from a minimum rate of $11.50 in 2007.

Critics say Liu made the change to curry favor with organized labor as he prepares for a much rumored run for mayor in 2013.

A spokesman for the comptroller says his office received the complaint and will review it.

This is not the first time Liu has been accused of unfairly hiking the prevailing wage, as a similar suit was filed last year involving moving companies.

Meanwhile, the comptroller continues to be on the hot seat in regards to his fundraising, after a prominent supporter was arrested and charged with wire fraud for allegedly funneling money to the campaign using illegal straw donors.