I'm quite familiar with the DEA loving to get their hands on large sums of cash you may be carrying (becuase of course people only carry large sums of cash if they are a drug dealer!). But for them to use the TSA, who should be spending their focus and time looking for weapons to worry about money and drugs is just lame.
Although I often get the grilling from customs - once in a while they talk me in circles asking the same questions twice, to which I often crack smart ... answers back to when it starts to piss me off - but they have never asked to look at my luggage.