Running out the clock on fraud

I can understand the SCOTUS  argument that setting the clock ticking on cases from when they occurred, rather from when they are discovered, makes a degree of sense insofar as it keeps the government from being able to keep digging for an infinite length of time.

But in a world where any sort of government oversight and sniffing into the truth is hampered by limited resources and complex investigation, it essentially lets folks involved in fraud duck a bullet by simply running out a relatively short clock.

Of course, Congress could alleviate the problem by changing the law to allow longer statute of limitations for suing for fraud in these cases.  What do you think the chances of that are these days?