Last April, the General Services Administration sparked outrage with the revelation that it had spent $800,000 on training meetings in Las Vegas.

The food and drinks alone totaled nearly $150,000. Well, that may have been just the tip of the iceberg

when it comes to government spending on such conferences.

A new report by the House Oversight and Government Reform Committee shows taxpayers picked up the tab for at least 894 conferences in 2012 -- to the tune of $340 million! The grand total is actually higher, but the new figures only cover "big-ticket" conferences that cost more than $100,000. Some agencies were worse than others. The Labor Department held four events for less than $1 million, but take a look at the chart above and you'll get a sense of how the rest of the money was spent.

Last on 'On the Record,' Greta Van Susteren talked about the expenditures with committee chairman Rep. Darrell Issa.

He said with sequestration set to hit, and possibly cause layoffs of federal workers, this is the kind of spending that needs to be on the chopping block.

"This is the kind of thing that would cause you not to have to lay off people that are needed to do real jobs," said Issa.