Well, as they say, "WTF"?

Since moving back here to the only place we can afford to live, things have been "...hand to mouth...", to quote the one who should know.
My own spending has been minimal; I feel that each and every penny should be accounted for, and while that's not necessarily a bad thing, I'm wondering if it's really warranted. 
Today, at the mailbox, there was a letter from the county auditor, who, in this state, is the agent for vehicle licensing.
Enclosed was a new license tag for another year on a BMW.
While we technically "own" the BMW, we don't ever use it.  It's in the hands of offspring who is gainfully employed, and has been for many years.
You'll recall that it was that offspring and his girl friend who spent about seven years on welfare (from my employment earnings intended for retirement savings) while I worked 12-hour days; this pattern continued even when the two of them were working and both banking their own checks.
Much of that money would have been invested in gold and silver; silver was about $7 dollars then, and gold was about $440.  Now they're $21.00 and $1300.
It was the shortfall caused by that, coupled with the failure of him to buy the house that we now live in (now the only place we can afford), that brings us to the present day.  He now has a NEW home, ("There's plenty of money in savings", according to his now-wife).  Same line when he wanted new firearms or paid for repairs for their truck, for which they paid cash.
I KNOW why there's "Plenty of money in savings".  I EARNED IT!!!
Anyway, the license tag got me thinking "Why are we still paying for his tags"?
This lead me to check the bank account, which offered no clue at all; however, the account that the social security checks go DOES show a debit for the tags.  And more.
Recalling back several years, we picked up his student loan payments for a number of years until we got fined by the IRS for doing so and claiming the interest on our tax returns; at that time, we paid several hundred dollars in fines and agreed that he would pay for his own student loans from then on.
Imagine my surprise to find that since the SS account was opened about two years ago, $4,000 has been paid for student loans!
Student loans we had agreed NOT to pay!
It should be noted that we also pay for his car insurance and cell phone bills, too.
Never a "Thank you", or anything approaching it.
No "I'm sorry you have a retirement totally devoid of dignity", either.