Government already is limited via the 4th amendment, Wiretap Act, and other statutes.
Now that's funny right there, I don't care who you are!
Two words: "Parallel construction".
The US government has become powerful enough and the power concentrated enough away from the States and citizens to the federal government that those limits no longer have any real meaning or force behind them except as propaganda for the masses.
Rule of Law is no longer applied relatively (nothing is perfect) equally nor universally. Far from it, as a glance at recent headlines proves. Laws in the US currently apply to, and are enforceable against, an individual or business/corporation in direct proportion to the amount of wealth and power they wield. "Too big to fail"..."No intent (when the federal laws in question do not care about nor require intent in determining guilt/innocence, only *possibly* as part of determining the length of prison time) to mishandle Top Secret documents/data".