I am dubious as to the validity of your sources. Here is Orban saying something similar but
sharply distinct:
On the subject of social benefits for migrant workers (an expression that makes Orbán wince when applied to Hungarians working in the UK), he announced that the Visegrád 4 countries had achieved their objective of ensuring EU citizens continue to have the right to work anywhere in the bloc without obstruction. He offered as proof of success the fact that Hungarians working in other EU countries would have access to social services “without discrimination.” Thanks to the results achieved at the summit, Hungarians working abroad would “continue to receive what they paid for to date”, in other words, there would be no roll-back in benefits for Hungarians already working in the UK.
Orbán said that in the case of families with children working in Great Britain, it was agreed that the level of social support they receive would be adjusted to reflect disparities in the cost of living in the case of those foreign workers whose children are living in another country. He said families living in the UK with their children would continue to receive the same benefits as British families with children.