what president destroyed the boundaries reining in the federal government causing the massive deficits we have today?
that is the important question because your question is misleading since it often depends on congress as well
The answer to your question is far too complex to answer completely. But it is definitely not one President.
Your thinking FDR for Social Security. And your thinking Johnson for Medicare.
I will leave Johnson and medicare alone simply because the argument ties in to too many other arguments and it runs too deep for anything to happen in this forum other than annoying the crap out of each other. Then we'd wind up debating Obamacare after 100,000 words and a week of no sleep.
But I'd like to address Social Security:
First off, Social Security has never once been a part of the deficit or the debt in a legit way.
At present, Social Security is running a 2.6 trillion dollar surplus.
What happens is the surplus that Social Security runs each and every year is used to buy government bonds.
These bonds then represent money owed to Social Security. At present, Social Security is owed 2.6 trillion dollars.
2.6 trillion dollars of our national debt is due to Social Security. But it is not because income tax revenue is needed to support Social Security.
It is quite the opposite. Social Security surplus has been used to support the Federal Government.
It is confusing I know. And this fact is why the Right Wing and Libertarian pundits and politicians have been so successful at perpetuating the lie.
Social Security has never been the cause of even 1 single cent of deficit. The debt that the bonds represent, which were purchased with Social Security money, now that is a different story. But this is not the fault of Social Security.
Social Programs and Medicare do represent part of the deficit each year.
But no where near as much as military spending. Tax cuts to the super wealthy that we can not afford also represent a good chunk of the deficit.
But to answer your question,
I'd have to say Johnson for creating Medicare. (giving you this one to keep myself honest)
I'd have to say Reagan and Bush for massive increases in military spending as well as tax cuts that ballooned the deficit.
Obama could be on this list but like medicare, its rather complicated. A lot would depend on whether or not you believe the economic crisis allowed by deregulation truly ever existed or not, which then leads to whether or not the solutions that Bush, Obama, and Congress all implemented were required or wasteful. And again, that is a not a winnable debate by either side.