There is a degree of a pinch at both sides, but to call the left and right just as problematic is equivocation.
There's a tremendous irony to the right and libertarians complaining about the "evils" of welfare while staunchly refusing to raise the minimum wage, subsidize education and create tax plans that actually favor the middle class, rather than making token nods while ultimately supporting the rich. How the hell are you supposed to rise into the middle class when you make so little that you can't save any money, and college is so expensive that it might as well be a pipe dream? Why would you want to escape welfare when the jobs you can get pay so poorly that you have to work two or three of them, forcing you to make major sacrifices in your personal life? A parent who has to work 16 hours a day to feed their child isn't going to be a great parent.
Besides, many in the right act as if illegal immigration is a spigot you can just turn off, and that there won't be any dramatic readjustments necessary. Sorry, but Trump's wall is just a racist's wet dream, and mass deportations would be both extremely expensive and impractical. What happens to Mexico if there are suddenly 11 million 'new' people? How does the country take care of them without destabilizing its economy, or allowing exploitation by drug cartels? And don't argue that it's "not our problem" after that -- you know that spikes in poverty and crime in Mexico would spill over the border. The US could use tougher enforcement of existing laws and of the border itself, but any realistic solution accepts that you can't stop everyone, and that some of the people who crossed illegally will likely be here to stay.
And remember, it's frequently businesses that turn a blind eye to immigration, not government. Many of them actually want illegal immigrants, because that lets them avoid the wages and benefits that they'd have to pay legal residents. You'd have to have plans in place that both soften the blow of using legal workers and prevent these companies from trying to stiff employees in other ways. And unfortunately, I don't see Republicans or libertarians doing anything to protect legal workers against that kind of retribution. If it's not managed properly, a dramatic reduction in the number of illegal immigrants would both shrink the workforce and screw over American workers.