Congressional stock trading

I haven’t paid a lot of attention to the controversy surrounding Congressional stock trading, but 1) I assume it’s a real problem and 2) it’s obviously going to be very difficult to get a strong reform bill through Congress. 

So here’s a proposal:  why not craft a strong bill – bright line rules, no exceptions – that will take effect in 10 years?  Of course, it would be best to enact a strong bill today, but given the difficulties involved, why not let today’s members of Congress impose rules on future lawmakers rather than on themselves?