As this is an often used quote to supposedly 'prove' how 'left-wing' or 'socialist' Mussolini was, it is indeed noteworthy to look at the actual text.
His own words from
La situazione economica (26 maggio 1934)
with some context:
Viceversa le banche in Italia, forse per aiutare anche le industrie, avevano fatto una formidabile indigestione di titoli industriali, titoli il cui corso in borsa era precipitato.
Allora che cosa è accaduto? Questa indigestione di titoli è stata scaricata sopra un istituto che prima si chiamava di liquidazione e adesso si chiama di Ricostruzione Industriale, che ha però due sezioni, una dell'ospedale e l'altra del convalescenziario, misura con la quale tutte le banche oggi possono ritornare a fare le banche.
Ma tutto questo è costato: tutto questo figurerà nelle voci del Bilancio dello Stato. È scaglionato nel tempo. Lo abbiamo alleggerito, scaglionato nel tempo, ma ne avremo fino al 1953.
Vedete che l'operazione era importante e delicata, ma necessaria perché risanatrice.
Oggi questa è una partita chiusa. Siamo a posto. Mi fanno ridere quelli che parlano ancora — ridere e piangere, tutt'e due le cose insieme — quelli che parlano ancora di un'economia liberale! (Commenti). Ma i tre quarti dell'economia italiana industriale e agricola, sono sulle braccia dello Stato! E se io fossi vago (il che non è), di introdurre in Italia il capitalismo di Stato o il socialismo di Stato, che è il rovescio della medaglia, io avrei oggi le condizioni necessarie sufficienti e obiettive per farlo.
Un'altra voce grava sul bilancio: gli interventi! Si dovevano fare? Certamente. Volevate far fallire tutti i consorzi agrari d'Italia? No. E questa cosa ha voluto dire 180 milioni.
E ai solfatai? e all'industria? all'agricoltura?
Tutto questo costa e si traduce in impostazioni di bilancio. È necessario. Perché è necessario? Perché oggi siamo in uno stato di vera e propria guerra economica, per cui certe formule che andavano prima di oggi, nelle condizioni attuali non funzionano più.
–– Benito Mussolini: "La situazione economica dell'Italia – Discorso Pronunciato Alla Camera – Il 26 Maggio 1934 XII" Direzione del Partito Nazionale Fascista, 1934.

That would roughly translate to:
On the other hand, the banks in Italy, perhaps to help the industries, had made a formidable indigestion of industrial securities, securities whose stock exchange prices had plummeted.
So what happened? This indigestion of securities has been dumped on an institution that was formerly called a liquidation institution and is now called Industrial Reconstruction, which however has two sections, one of the hospital and the other of the convalescent home, a measure with which all banks can now return to make banks.
But all this has cost money: all this will appear in the items of the State Budget. It is staggered over time. We have lightened it, staggered it over time, but we will have it until 1953.
You can see that the operation was important and delicate, but necessary because it was a healing operation.
Today this is a finished game. We're good. It makes me laugh at those who are still talking – laughing and crying, both things at the same time – those who are still talking about a liberal economy! (Comments). But three quarters of the Italian industrial and agricultural economy are in the arms of the State! And if I had the desire (which I don't), to introduce state capitalism or state socialism in Italy, which is the other side of the coin, I would today have sufficient and objective conditions to do so.
Another item weighs on the budget: interventions! Should they have been done? Certainly. Did you want to bankrupt all the agricultural consortia in Italy? No. And this thing meant 180 million.
And to the solfatai? and to industry? and to agriculture?
All of this costs money and translates into budgetary approaches. It's necessary. Why is it necessary? Because today we are in a state of real economic war, so certain formulas that went before today, in the current conditions no longer work.
He said/wrote that three quarters of the economy of Italy were "in the arms" of the state. Meaning more that the state was protecting these quarters, in analogy to modern day bail-outs! Not commando-style total control like in a planned economy. Without state subsidies more enterprises would go belly up.
Whether that – the ratio – was objectively the case, true or not, is another question. But he also claimed that that was no longer a classical liberal economy, and not socialist nor a state capitalist economy either.
It seems quite clear that the English version leaves out a crucial part? He writes "And if I had the desire (which I don't)…" Meaning he is just boasting about his might and power over a hypothetical that he most explicitly denies! In his own words the economy of Italy was in 1934 characterised not as a form state capitalism or state socialism, and he had no plans to develop it into either said forms.
In this way, the corporative economy would be an alternative to socialism and a model for surpassing both liberal economics and the ‘Marxist class struggle’; in addition, the greater good of the nation would determine the economic decisions and actions of the players of the economic system: ‘This is the core of corporatism: the transformation of property and private initiative in a direction inspired by public-goals’
–– Lino Cinquini : "Fascist Corporative Economy and Accounting in Italy during the Thirties: Exploring the Relations between a Totalitarian Ideology and Business Studies", Accounting, Business & Financial History, Volume 17, 2007 - Issue 2