Johnson a JFK wanna-be? He heated Kennedy's guts...Ummm, I knew they tended to nail anything that moves, but that's the first I'd heard of them being rainbow warriors!
LBJ hated the name Kennedy. Keep in mind that LBJ was first and foremost an FDR New Dealer because as a Southern Democrat he absolutely loved pork. JFK and his corrupt old man were not all that impressed with FRD or the socialist wonks he had in his administration. JFK was pro business and anti-tax. For LBJ coming out of the corrupt Texas political system, the more pork the better. Dollars to spend gave the political class more and more power. Kennedy (John) was more of a fiscal moderate. Yes LBJ made a lot of Southern segregationists mad at him for following JFKs Civil Rights agenda, but he made it up to them in money from Uncle Sam. Nixon, who had the same Civil Rights agenda as Kennedy, did the same thing in spades.
If you want to lay blame for the welfare state, there are 3 presidents you need to go after. FDR for laying the foundation. LBJ for raising expectations. And Richard Nixon for delivering on those expectations. The Fed Budget went to 70% "non-discretionary" by the end of the 70s.