We'll have to see what the legislation actually says before we say that.
Here is Romney's position on those items.
http://www.ontheissues.org/2016/Mitt_Romney_Social_Security.htm
Q: In your book, you wanted the press to ask how to fix Social Security and Medicare. Would you raise the retirement age for Social Security, raise the eligibility age for Medicare, or reduce benefits for seniors with higher incomes?
ROMNEY: For the people who are already retired or 55 years of age and older, nothing changes. With Social Security--if you will, the 2.0 version for the next generations coming up-- I'd lower the rate of inflation growth in the benefits received by higher-income recipients and keep the rate as it is now for lower income recipients. And I'd also add a year or two to the retirement age under Social Security. With regards to Medicare, again, for higher-income recipients, lower benefit, a premium support program which allows people to buy either current standard Medicare or a private plan.
Cruz was a little more vague imo.
http://www.ontheissues.org/Economic/Ted_Cruz_Social_Security.htm
Q: You've argued for raising the retirement age and reducing benefits for future retirees, but reducing any sort of benefits for the elderly has always been notoriously hard to do politically. When Speaker Paul Ryan proposed replacing traditional Medicare with federally funded private plans a few years ago, a liberal group responded with a commercial that featured a granny being pushed off a cliff.
CRUZ: Well, my Mom is here, so I don't think we should be pushing any grannies off cliffs. And, you mis-stated what I've said on entitlement reform. What I've said is for seniors we should make no changes whatsoever, for younger workers we should gradually raise the retirement age, we should have benefits grow more slowly, and we should allow them to keep a portion of their taxes in a personal account that they control, and can pass on to their kids.