Floris de Witte has argued in relation to the different forms of solidarity which underpin free movement law that market solidarity clarifies that workers derive a degree of solidarity and social rights simply and exclusively by virtue of their engagement with a certain labour market, rather than by virtue of their nationality, citizenship, or residence. Access to welfare benefits in the state of employment, on this view, functions as a quid pro quo for the economic and functional engagement of migrant workers with that society. It is this notion of structural interdependency and economic reciprocity between the migrant worker and the host state that underlies the unconditional right to equal treatment in accessing welfare entitlements for such workers and their family members .do you agree?Why  or Why not? Explain