I would suggest “asset testing”. I know someone, very close to me, as in family member, worth more than I could ever hope to be, but has set up his finances in a way that shows minimal income, enabling him to take advantage of several gov’t programs, although he’s very vague on which ones.
Everything he’s doing is legal, within the rules as they’re currently written.
You can’t separate him from a penny if he doesn’t want it separated. He uses “other peoples” money to accomplish his goals.
If you mean asset testing to qualify for government programs, then that's really just a waste of time. It will require an army of government bureaucrats to monitor and enforce it, and there will always be loopholes to get around whatever limits are placed on it.