Do you think a credit agency would really have a problem getting around your dumb law? Another search engine? A proxy? Heck: it's a big business, they can write their own damn spider that simply looks for financial personal info on the web.
So if the problem really bothers you, you pass a law: "credit agencies can't keep records past 10 years"
That's actually effective.
Not this bulshit "the info is still there but you have to use a proxy or another search engine to find it." You really think someone committed to finding out this info about you won't make the extra 20 seconds of effort involved?
A dirtbag employer who is spending 5 minutes looking for dirt on potential employees won't think to use a proxy to find out the dirt he knows is out there? Really? You think using a proxy is as hard as going for microfiche in a library? Really?
Your "solution" is a pathetic band aid to make a few airheads feel good about your concern in a shallow way and with zero thought, without actually solving the actual fucking problem in a meaningful way.